From patchwork Fri Sep 24 08:28:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 12514435 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D8CF1C433EF for ; Fri, 24 Sep 2021 08:33:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C5CB8610D1 for ; Fri, 24 Sep 2021 08:33:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244762AbhIXIfI (ORCPT ); Fri, 24 Sep 2021 04:35:08 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:3855 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244742AbhIXIfH (ORCPT ); Fri, 24 Sep 2021 04:35:07 -0400 Received: from fraeml736-chm.china.huawei.com (unknown [172.18.147.207]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4HG4xD5j3Hz67Xh8; Fri, 24 Sep 2021 16:30:56 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml736-chm.china.huawei.com (10.206.15.217) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 10:33:32 +0200 Received: from localhost.localdomain (10.69.192.58) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 09:33:30 +0100 From: John Garry To: CC: , , , , , "John Garry" Subject: [PATCH v4 01/13] blk-mq: Change rqs check in blk_mq_free_rqs() Date: Fri, 24 Sep 2021 16:28:18 +0800 Message-ID: <1632472110-244938-2-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1632472110-244938-1-git-send-email-john.garry@huawei.com> References: <1632472110-244938-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org The original code in commit 24d2f90309b23 ("blk-mq: split out tag initialization, support shared tags") would check tags->rqs is non-NULL and then dereference tags->rqs[]. Then in commit 2af8cbe30531 ("blk-mq: split tag ->rqs[] into two"), we started to dereference tags->static_rqs[], but continued to check non-NULL tags->rqs. Check tags->static_rqs as non-NULL instead, which is more logical. Signed-off-by: John Garry Reviewed-by: Ming Lei Reviewed-by: Hannes Reinecke --- block/blk-mq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index 108a352051be..2316ff27c1f5 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2340,7 +2340,7 @@ void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags, { struct page *page; - if (tags->rqs && set->ops->exit_request) { + if (tags->static_rqs && set->ops->exit_request) { int i; for (i = 0; i < tags->nr_tags; i++) { From patchwork Fri Sep 24 08:28:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 12514437 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 58601C433F5 for ; Fri, 24 Sep 2021 08:33:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 37246610C7 for ; Fri, 24 Sep 2021 08:33:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244778AbhIXIfL (ORCPT ); Fri, 24 Sep 2021 04:35:11 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:3856 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244773AbhIXIfK (ORCPT ); Fri, 24 Sep 2021 04:35:10 -0400 Received: from fraeml737-chm.china.huawei.com (unknown [172.18.147.200]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4HG4wy6KhLz67gRP; Fri, 24 Sep 2021 16:30:42 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml737-chm.china.huawei.com (10.206.15.218) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 10:33:34 +0200 Received: from localhost.localdomain (10.69.192.58) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 09:33:32 +0100 From: John Garry To: CC: , , , , , "John Garry" Subject: [PATCH v4 02/13] block: Rename BLKDEV_MAX_RQ -> BLKDEV_DEFAULT_RQ Date: Fri, 24 Sep 2021 16:28:19 +0800 Message-ID: <1632472110-244938-3-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1632472110-244938-1-git-send-email-john.garry@huawei.com> References: <1632472110-244938-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org It is a bit confusing that there is BLKDEV_MAX_RQ and MAX_SCHED_RQ, as the name BLKDEV_MAX_RQ would imply the max requests always, which it is not. Rename to BLKDEV_MAX_RQ to BLKDEV_DEFAULT_RQ, matching it's usage - that being the default number of requests assigned when allocating a request queue. Signed-off-by: John Garry Reviewed-by: Ming Lei Reviewed-by: Hannes Reinecke --- block/blk-core.c | 2 +- block/blk-mq-sched.c | 2 +- block/blk-mq-sched.h | 2 +- drivers/block/rbd.c | 2 +- include/linux/blkdev.h | 2 +- 5 files changed, 5 insertions(+), 5 deletions(-) diff --git a/block/blk-core.c b/block/blk-core.c index 5454db2fa263..5d7137bec48e 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -568,7 +568,7 @@ struct request_queue *blk_alloc_queue(int node_id) blk_queue_dma_alignment(q, 511); blk_set_default_limits(&q->limits); - q->nr_requests = BLKDEV_MAX_RQ; + q->nr_requests = BLKDEV_DEFAULT_RQ; return q; diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c index 0f006cabfd91..2231fb0d4c35 100644 --- a/block/blk-mq-sched.c +++ b/block/blk-mq-sched.c @@ -606,7 +606,7 @@ int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e) * Additionally, this is a per-hw queue depth. */ q->nr_requests = 2 * min_t(unsigned int, q->tag_set->queue_depth, - BLKDEV_MAX_RQ); + BLKDEV_DEFAULT_RQ); queue_for_each_hw_ctx(q, hctx, i) { ret = blk_mq_sched_alloc_tags(q, hctx, i); diff --git a/block/blk-mq-sched.h b/block/blk-mq-sched.h index 5246ae040704..1e46be6c5178 100644 --- a/block/blk-mq-sched.h +++ b/block/blk-mq-sched.h @@ -5,7 +5,7 @@ #include "blk-mq.h" #include "blk-mq-tag.h" -#define MAX_SCHED_RQ (16 * BLKDEV_MAX_RQ) +#define MAX_SCHED_RQ (16 * BLKDEV_DEFAULT_RQ) void blk_mq_sched_assign_ioc(struct request *rq); diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index e65c9d706f6f..bf60aebd0cfb 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -836,7 +836,7 @@ struct rbd_options { u32 alloc_hint_flags; /* CEPH_OSD_OP_ALLOC_HINT_FLAG_* */ }; -#define RBD_QUEUE_DEPTH_DEFAULT BLKDEV_MAX_RQ +#define RBD_QUEUE_DEPTH_DEFAULT BLKDEV_DEFAULT_RQ #define RBD_ALLOC_SIZE_DEFAULT (64 * 1024) #define RBD_LOCK_TIMEOUT_DEFAULT 0 /* no timeout */ #define RBD_READ_ONLY_DEFAULT false diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 12b9dbcc980e..4baf9435232d 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -40,7 +40,7 @@ struct blk_stat_callback; struct blk_keyslot_manager; #define BLKDEV_MIN_RQ 4 -#define BLKDEV_MAX_RQ 128 /* Default maximum */ +#define BLKDEV_DEFAULT_RQ 128 /* Must be consistent with blk_mq_poll_stats_bkt() */ #define BLK_MQ_POLL_STATS_BKTS 16 From patchwork Fri Sep 24 08:28:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 12514439 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 63B8BC433F5 for ; Fri, 24 Sep 2021 08:33:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4D60361242 for ; Fri, 24 Sep 2021 08:33:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244773AbhIXIfN (ORCPT ); Fri, 24 Sep 2021 04:35:13 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:3857 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244742AbhIXIfL (ORCPT ); Fri, 24 Sep 2021 04:35:11 -0400 Received: from fraeml735-chm.china.huawei.com (unknown [172.18.147.200]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4HG4x10Fhdz67kT0; Fri, 24 Sep 2021 16:30:45 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml735-chm.china.huawei.com (10.206.15.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 10:33:36 +0200 Received: from localhost.localdomain (10.69.192.58) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 09:33:34 +0100 From: John Garry To: CC: , , , , , "John Garry" Subject: [PATCH v4 03/13] blk-mq: Relocate shared sbitmap resize in blk_mq_update_nr_requests() Date: Fri, 24 Sep 2021 16:28:20 +0800 Message-ID: <1632472110-244938-4-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1632472110-244938-1-git-send-email-john.garry@huawei.com> References: <1632472110-244938-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org For shared sbitmap, if the call to blk_mq_tag_update_depth() was successful for any hctx when hctx->sched_tags is not set, then it would be successful for all (due to nature in which blk_mq_tag_update_depth() fails). As such, there is no need to call blk_mq_tag_resize_shared_sbitmap() for each hctx. So relocate the call until after the hctx iteration under the !q->elevator check, which is equivalent (to !hctx->sched_tags). Signed-off-by: John Garry Reviewed-by: Ming Lei Reviewed-by: Hannes Reinecke --- block/blk-mq.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index 2316ff27c1f5..1a4bb2db30e5 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -3616,8 +3616,6 @@ int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr) if (!hctx->sched_tags) { ret = blk_mq_tag_update_depth(hctx, &hctx->tags, nr, false); - if (!ret && blk_mq_is_sbitmap_shared(set->flags)) - blk_mq_tag_resize_shared_sbitmap(set, nr); } else { ret = blk_mq_tag_update_depth(hctx, &hctx->sched_tags, nr, true); @@ -3635,9 +3633,13 @@ int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr) } if (!ret) { q->nr_requests = nr; - if (q->elevator && blk_mq_is_sbitmap_shared(set->flags)) - sbitmap_queue_resize(&q->sched_bitmap_tags, - nr - set->reserved_tags); + if (blk_mq_is_sbitmap_shared(set->flags)) { + if (q->elevator) + sbitmap_queue_resize(&q->sched_bitmap_tags, + nr - set->reserved_tags); + else + blk_mq_tag_resize_shared_sbitmap(set, nr); + } } blk_mq_unquiesce_queue(q); From patchwork Fri Sep 24 08:28:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 12514441 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AFAE2C433FE for ; Fri, 24 Sep 2021 08:33:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9A1EB610D1 for ; Fri, 24 Sep 2021 08:33:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244820AbhIXIfQ (ORCPT ); Fri, 24 Sep 2021 04:35:16 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:3858 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244797AbhIXIfN (ORCPT ); Fri, 24 Sep 2021 04:35:13 -0400 Received: from fraeml734-chm.china.huawei.com (unknown [172.18.147.206]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4HG4x32MSfz6H6kb; Fri, 24 Sep 2021 16:30:47 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml734-chm.china.huawei.com (10.206.15.215) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 10:33:39 +0200 Received: from localhost.localdomain (10.69.192.58) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 09:33:36 +0100 From: John Garry To: CC: , , , , , "John Garry" Subject: [PATCH v4 04/13] blk-mq: Invert check in blk_mq_update_nr_requests() Date: Fri, 24 Sep 2021 16:28:21 +0800 Message-ID: <1632472110-244938-5-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1632472110-244938-1-git-send-email-john.garry@huawei.com> References: <1632472110-244938-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org It's easier to read: if (x) X; else Y; over: if (!x) Y; else X; No functional change intended. Signed-off-by: John Garry Reviewed-by: Ming Lei Reviewed-by: Hannes Reinecke --- block/blk-mq.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index 1a4bb2db30e5..47d6ab725bcc 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -3613,18 +3613,18 @@ int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr) * If we're using an MQ scheduler, just update the scheduler * queue depth. This is similar to what the old code would do. */ - if (!hctx->sched_tags) { - ret = blk_mq_tag_update_depth(hctx, &hctx->tags, nr, - false); - } else { + if (hctx->sched_tags) { ret = blk_mq_tag_update_depth(hctx, &hctx->sched_tags, - nr, true); + nr, true); if (blk_mq_is_sbitmap_shared(set->flags)) { hctx->sched_tags->bitmap_tags = &q->sched_bitmap_tags; hctx->sched_tags->breserved_tags = &q->sched_breserved_tags; } + } else { + ret = blk_mq_tag_update_depth(hctx, &hctx->tags, nr, + false); } if (ret) break; From patchwork Fri Sep 24 08:28:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 12514443 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 954A8C4332F for ; Fri, 24 Sep 2021 08:33:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7F8D36124B for ; Fri, 24 Sep 2021 08:33:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244797AbhIXIfU (ORCPT ); Fri, 24 Sep 2021 04:35:20 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:3859 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244814AbhIXIfQ (ORCPT ); Fri, 24 Sep 2021 04:35:16 -0400 Received: from fraeml714-chm.china.huawei.com (unknown [172.18.147.226]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4HG4xP255Fz67Xk3; Fri, 24 Sep 2021 16:31:05 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml714-chm.china.huawei.com (10.206.15.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 10:33:41 +0200 Received: from localhost.localdomain (10.69.192.58) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 09:33:39 +0100 From: John Garry To: CC: , , , , , "John Garry" Subject: [PATCH v4 05/13] blk-mq-sched: Rename blk_mq_sched_alloc_{tags -> map_and_rqs}() Date: Fri, 24 Sep 2021 16:28:22 +0800 Message-ID: <1632472110-244938-6-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1632472110-244938-1-git-send-email-john.garry@huawei.com> References: <1632472110-244938-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Function blk_mq_sched_alloc_tags() does same as __blk_mq_alloc_map_and_request(), so give a similar name to be consistent. Similarly rename label err_free_tags -> err_free_map_and_rqs. Signed-off-by: John Garry Reviewed-by: Ming Lei Reviewed-by: Hannes Reinecke --- block/blk-mq-sched.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c index 2231fb0d4c35..644b6d554d72 100644 --- a/block/blk-mq-sched.c +++ b/block/blk-mq-sched.c @@ -515,9 +515,9 @@ void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx, percpu_ref_put(&q->q_usage_counter); } -static int blk_mq_sched_alloc_tags(struct request_queue *q, - struct blk_mq_hw_ctx *hctx, - unsigned int hctx_idx) +static int blk_mq_sched_alloc_map_and_rqs(struct request_queue *q, + struct blk_mq_hw_ctx *hctx, + unsigned int hctx_idx) { struct blk_mq_tag_set *set = q->tag_set; int ret; @@ -609,15 +609,15 @@ int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e) BLKDEV_DEFAULT_RQ); queue_for_each_hw_ctx(q, hctx, i) { - ret = blk_mq_sched_alloc_tags(q, hctx, i); + ret = blk_mq_sched_alloc_map_and_rqs(q, hctx, i); if (ret) - goto err_free_tags; + goto err_free_map_and_rqs; } if (blk_mq_is_sbitmap_shared(q->tag_set->flags)) { ret = blk_mq_init_sched_shared_sbitmap(q); if (ret) - goto err_free_tags; + goto err_free_map_and_rqs; } ret = e->ops.init_sched(q, e); @@ -645,7 +645,7 @@ int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e) err_free_sbitmap: if (blk_mq_is_sbitmap_shared(q->tag_set->flags)) blk_mq_exit_sched_shared_sbitmap(q); -err_free_tags: +err_free_map_and_rqs: blk_mq_sched_free_requests(q); blk_mq_sched_tags_teardown(q); q->elevator = NULL; From patchwork Fri Sep 24 08:28:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 12514445 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C5C7CC433FE for ; Fri, 24 Sep 2021 08:33:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B11FC60F41 for ; Fri, 24 Sep 2021 08:33:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244851AbhIXIfV (ORCPT ); Fri, 24 Sep 2021 04:35:21 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:3860 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244827AbhIXIfS (ORCPT ); Fri, 24 Sep 2021 04:35:18 -0400 Received: from fraeml713-chm.china.huawei.com (unknown [172.18.147.201]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4HG4xb6qbVz67kg2; Fri, 24 Sep 2021 16:31:15 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml713-chm.china.huawei.com (10.206.15.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 10:33:43 +0200 Received: from localhost.localdomain (10.69.192.58) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 09:33:41 +0100 From: John Garry To: CC: , , , , , "John Garry" Subject: [PATCH v4 06/13] blk-mq-sched: Rename blk_mq_sched_free_{requests -> rqs}() Date: Fri, 24 Sep 2021 16:28:23 +0800 Message-ID: <1632472110-244938-7-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1632472110-244938-1-git-send-email-john.garry@huawei.com> References: <1632472110-244938-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org To be more concise and consistent in naming, rename blk_mq_sched_free_requests() -> blk_mq_sched_free_rqs(). Signed-off-by: John Garry Reviewed-by: Hannes Reinecke Reviewed-by: Ming Lei --- block/blk-core.c | 2 +- block/blk-mq-sched.c | 6 +++--- block/blk-mq-sched.h | 2 +- block/blk.h | 2 +- 4 files changed, 6 insertions(+), 6 deletions(-) diff --git a/block/blk-core.c b/block/blk-core.c index 5d7137bec48e..3480df0e958c 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -406,7 +406,7 @@ void blk_cleanup_queue(struct request_queue *q) */ mutex_lock(&q->sysfs_lock); if (q->elevator) - blk_mq_sched_free_requests(q); + blk_mq_sched_free_rqs(q); mutex_unlock(&q->sysfs_lock); percpu_ref_exit(&q->q_usage_counter); diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c index 644b6d554d72..bdbb6c31b433 100644 --- a/block/blk-mq-sched.c +++ b/block/blk-mq-sched.c @@ -631,7 +631,7 @@ int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e) ret = e->ops.init_hctx(hctx, i); if (ret) { eq = q->elevator; - blk_mq_sched_free_requests(q); + blk_mq_sched_free_rqs(q); blk_mq_exit_sched(q, eq); kobject_put(&eq->kobj); return ret; @@ -646,7 +646,7 @@ int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e) if (blk_mq_is_sbitmap_shared(q->tag_set->flags)) blk_mq_exit_sched_shared_sbitmap(q); err_free_map_and_rqs: - blk_mq_sched_free_requests(q); + blk_mq_sched_free_rqs(q); blk_mq_sched_tags_teardown(q); q->elevator = NULL; return ret; @@ -656,7 +656,7 @@ int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e) * called in either blk_queue_cleanup or elevator_switch, tagset * is required for freeing requests */ -void blk_mq_sched_free_requests(struct request_queue *q) +void blk_mq_sched_free_rqs(struct request_queue *q) { struct blk_mq_hw_ctx *hctx; int i; diff --git a/block/blk-mq-sched.h b/block/blk-mq-sched.h index 1e46be6c5178..e70748d18754 100644 --- a/block/blk-mq-sched.h +++ b/block/blk-mq-sched.h @@ -28,7 +28,7 @@ void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx); int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e); void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e); -void blk_mq_sched_free_requests(struct request_queue *q); +void blk_mq_sched_free_rqs(struct request_queue *q); static inline bool blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio, diff --git a/block/blk.h b/block/blk.h index 7d2a0ba7ed21..6f125c8cddb0 100644 --- a/block/blk.h +++ b/block/blk.h @@ -200,7 +200,7 @@ static inline void elevator_exit(struct request_queue *q, { lockdep_assert_held(&q->sysfs_lock); - blk_mq_sched_free_requests(q); + blk_mq_sched_free_rqs(q); __elevator_exit(q, e); } From patchwork Fri Sep 24 08:28:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 12514447 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 58A85C433F5 for ; Fri, 24 Sep 2021 08:33:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 423A961263 for ; Fri, 24 Sep 2021 08:33:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244796AbhIXIfZ (ORCPT ); Fri, 24 Sep 2021 04:35:25 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:3861 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244794AbhIXIfT (ORCPT ); Fri, 24 Sep 2021 04:35:19 -0400 Received: from fraeml715-chm.china.huawei.com (unknown [172.18.147.226]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4HG4xd5y5wz67mJP; Fri, 24 Sep 2021 16:31:17 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml715-chm.china.huawei.com (10.206.15.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 10:33:45 +0200 Received: from localhost.localdomain (10.69.192.58) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 09:33:43 +0100 From: John Garry To: CC: , , , , , "John Garry" Subject: [PATCH v4 07/13] blk-mq: Pass driver tags to blk_mq_clear_rq_mapping() Date: Fri, 24 Sep 2021 16:28:24 +0800 Message-ID: <1632472110-244938-8-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1632472110-244938-1-git-send-email-john.garry@huawei.com> References: <1632472110-244938-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Function blk_mq_clear_rq_mapping() will be used for shared sbitmap tags in future, so pass a driver tags pointer instead of the tagset container and HW queue index. Signed-off-by: John Garry Reviewed-by: Hannes Reinecke Reviewed-by: Ming Lei --- block/blk-mq.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index 47d6ab725bcc..4bae8afdfbe1 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2302,10 +2302,9 @@ static size_t order_to_size(unsigned int order) } /* called before freeing request pool in @tags */ -static void blk_mq_clear_rq_mapping(struct blk_mq_tag_set *set, - struct blk_mq_tags *tags, unsigned int hctx_idx) +static void blk_mq_clear_rq_mapping(struct blk_mq_tags *drv_tags, + struct blk_mq_tags *tags) { - struct blk_mq_tags *drv_tags = set->tags[hctx_idx]; struct page *page; unsigned long flags; @@ -2314,7 +2313,7 @@ static void blk_mq_clear_rq_mapping(struct blk_mq_tag_set *set, unsigned long end = start + order_to_size(page->private); int i; - for (i = 0; i < set->queue_depth; i++) { + for (i = 0; i < drv_tags->nr_tags; i++) { struct request *rq = drv_tags->rqs[i]; unsigned long rq_addr = (unsigned long)rq; @@ -2338,8 +2337,11 @@ static void blk_mq_clear_rq_mapping(struct blk_mq_tag_set *set, void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags, unsigned int hctx_idx) { + struct blk_mq_tags *drv_tags; struct page *page; + drv_tags = set->tags[hctx_idx]; + if (tags->static_rqs && set->ops->exit_request) { int i; @@ -2353,7 +2355,7 @@ void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags, } } - blk_mq_clear_rq_mapping(set, tags, hctx_idx); + blk_mq_clear_rq_mapping(drv_tags, tags); while (!list_empty(&tags->page_list)) { page = list_first_entry(&tags->page_list, struct page, lru); From patchwork Fri Sep 24 08:28:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 12514449 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 20D36C433F5 for ; Fri, 24 Sep 2021 08:34:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0DBD760F41 for ; Fri, 24 Sep 2021 08:34:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244858AbhIXIfd (ORCPT ); Fri, 24 Sep 2021 04:35:33 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:3862 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244823AbhIXIfW (ORCPT ); Fri, 24 Sep 2021 04:35:22 -0400 Received: from fraeml712-chm.china.huawei.com (unknown [172.18.147.226]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4HG4xC5NtLz6H6gn; Fri, 24 Sep 2021 16:30:55 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml712-chm.china.huawei.com (10.206.15.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 10:33:47 +0200 Received: from localhost.localdomain (10.69.192.58) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 09:33:45 +0100 From: John Garry To: CC: , , , , , "John Garry" Subject: [PATCH v4 08/13] blk-mq: Don't clear driver tags own mapping Date: Fri, 24 Sep 2021 16:28:25 +0800 Message-ID: <1632472110-244938-9-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1632472110-244938-1-git-send-email-john.garry@huawei.com> References: <1632472110-244938-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Function blk_mq_clear_rq_mapping() is required to clear the sched tags mappings in driver tags rqs[]. But there is no need for a driver tags to clear its own mapping, so skip clearing the mapping in this scenario. Signed-off-by: John Garry Reviewed-by: Hannes Reinecke Reviewed-by: Ming Lei --- block/blk-mq.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/block/blk-mq.c b/block/blk-mq.c index 4bae8afdfbe1..5229c5420b85 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2308,6 +2308,10 @@ static void blk_mq_clear_rq_mapping(struct blk_mq_tags *drv_tags, struct page *page; unsigned long flags; + /* There is no need to clear a driver tags own mapping */ + if (drv_tags == tags) + return; + list_for_each_entry(page, &tags->page_list, lru) { unsigned long start = (unsigned long)page_address(page); unsigned long end = start + order_to_size(page->private); From patchwork Fri Sep 24 08:28:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 12514503 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4C7C2C433EF for ; Fri, 24 Sep 2021 08:34:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 39B9160F41 for ; Fri, 24 Sep 2021 08:34:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244946AbhIXIfk (ORCPT ); Fri, 24 Sep 2021 04:35:40 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:3863 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244825AbhIXIfY (ORCPT ); Fri, 24 Sep 2021 04:35:24 -0400 Received: from fraeml711-chm.china.huawei.com (unknown [172.18.147.201]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4HG4xF3lGxz67kT0; Fri, 24 Sep 2021 16:30:57 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml711-chm.china.huawei.com (10.206.15.60) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 10:33:49 +0200 Received: from localhost.localdomain (10.69.192.58) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 09:33:47 +0100 From: John Garry To: CC: , , , , , "John Garry" Subject: [PATCH v4 09/13] blk-mq: Add blk_mq_tag_update_sched_shared_sbitmap() Date: Fri, 24 Sep 2021 16:28:26 +0800 Message-ID: <1632472110-244938-10-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1632472110-244938-1-git-send-email-john.garry@huawei.com> References: <1632472110-244938-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Put the functionality to update the sched shared sbitmap size in a common function. Since the same formula is always used to resize, and it can be got from the request queue argument, so just pass the request queue pointer. Signed-off-by: John Garry Reviewed-by: Ming Lei Reviewed-by: Hannes Reinecke --- block/blk-mq-sched.c | 3 +-- block/blk-mq-tag.c | 6 ++++++ block/blk-mq-tag.h | 1 + block/blk-mq.c | 3 +-- 4 files changed, 9 insertions(+), 4 deletions(-) diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c index bdbb6c31b433..6c15f6e98e2e 100644 --- a/block/blk-mq-sched.c +++ b/block/blk-mq-sched.c @@ -575,8 +575,7 @@ static int blk_mq_init_sched_shared_sbitmap(struct request_queue *queue) &queue->sched_breserved_tags; } - sbitmap_queue_resize(&queue->sched_bitmap_tags, - queue->nr_requests - set->reserved_tags); + blk_mq_tag_update_sched_shared_sbitmap(queue); return 0; } diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index ff5caeb82542..55b5a226dcc0 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c @@ -634,6 +634,12 @@ void blk_mq_tag_resize_shared_sbitmap(struct blk_mq_tag_set *set, unsigned int s sbitmap_queue_resize(&set->__bitmap_tags, size - set->reserved_tags); } +void blk_mq_tag_update_sched_shared_sbitmap(struct request_queue *q) +{ + sbitmap_queue_resize(&q->sched_bitmap_tags, + q->nr_requests - q->tag_set->reserved_tags); +} + /** * blk_mq_unique_tag() - return a tag that is unique queue-wide * @rq: request for which to compute a unique tag diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h index 8ed55af08427..88f3c6485543 100644 --- a/block/blk-mq-tag.h +++ b/block/blk-mq-tag.h @@ -48,6 +48,7 @@ extern int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx, unsigned int depth, bool can_grow); extern void blk_mq_tag_resize_shared_sbitmap(struct blk_mq_tag_set *set, unsigned int size); +extern void blk_mq_tag_update_sched_shared_sbitmap(struct request_queue *q); extern void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool); void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn, diff --git a/block/blk-mq.c b/block/blk-mq.c index 5229c5420b85..5fec444d6399 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -3641,8 +3641,7 @@ int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr) q->nr_requests = nr; if (blk_mq_is_sbitmap_shared(set->flags)) { if (q->elevator) - sbitmap_queue_resize(&q->sched_bitmap_tags, - nr - set->reserved_tags); + blk_mq_tag_update_sched_shared_sbitmap(q); else blk_mq_tag_resize_shared_sbitmap(set, nr); } From patchwork Fri Sep 24 08:28:27 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 12514505 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E9B91C433F5 for ; Fri, 24 Sep 2021 08:34:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D4E20610CF for ; Fri, 24 Sep 2021 08:34:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244989AbhIXIfu (ORCPT ); Fri, 24 Sep 2021 04:35:50 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:3864 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244836AbhIXIf0 (ORCPT ); Fri, 24 Sep 2021 04:35:26 -0400 Received: from fraeml709-chm.china.huawei.com (unknown [172.18.147.201]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4HG4xm24NHz67jWT; Fri, 24 Sep 2021 16:31:24 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml709-chm.china.huawei.com (10.206.15.37) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 10:33:51 +0200 Received: from localhost.localdomain (10.69.192.58) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 09:33:49 +0100 From: John Garry To: CC: , , , , , "John Garry" Subject: [PATCH v4 10/13] blk-mq: Add blk_mq_alloc_map_and_rqs() Date: Fri, 24 Sep 2021 16:28:27 +0800 Message-ID: <1632472110-244938-11-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1632472110-244938-1-git-send-email-john.garry@huawei.com> References: <1632472110-244938-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Add a function to combine allocating tags and the associated requests, and factor out common patterns to use this new function. Some function only call blk_mq_alloc_map_and_rqs() now, but more functionality will be added later. Also make blk_mq_alloc_rq_map() and blk_mq_alloc_rqs() static since they are only used in blk-mq.c, and finally rename some functions for conciseness and consistency with other function names: - __blk_mq_alloc_map_and_{request -> rqs}() - blk_mq_alloc_{map_and_requests -> set_map_and_rqs}() Suggested-by: Ming Lei Signed-off-by: John Garry Reviewed-by: Hannes Reinecke Reviewed-by: Ming Lei --- block/blk-mq-sched.c | 15 +++-------- block/blk-mq-tag.c | 9 +------ block/blk-mq.c | 62 +++++++++++++++++++++++++------------------- block/blk-mq.h | 9 ++----- 4 files changed, 42 insertions(+), 53 deletions(-) diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c index 6c15f6e98e2e..d1b56bb9ac64 100644 --- a/block/blk-mq-sched.c +++ b/block/blk-mq-sched.c @@ -519,21 +519,12 @@ static int blk_mq_sched_alloc_map_and_rqs(struct request_queue *q, struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx) { - struct blk_mq_tag_set *set = q->tag_set; - int ret; + hctx->sched_tags = blk_mq_alloc_map_and_rqs(q->tag_set, hctx_idx, + q->nr_requests); - hctx->sched_tags = blk_mq_alloc_rq_map(set, hctx_idx, q->nr_requests, - set->reserved_tags, set->flags); if (!hctx->sched_tags) return -ENOMEM; - - ret = blk_mq_alloc_rqs(set, hctx->sched_tags, hctx_idx, q->nr_requests); - if (ret) { - blk_mq_free_rq_map(hctx->sched_tags, set->flags); - hctx->sched_tags = NULL; - } - - return ret; + return 0; } /* called in queue's release handler, tagset has gone away */ diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index 55b5a226dcc0..db99f1246795 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c @@ -592,7 +592,6 @@ int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx, if (tdepth > tags->nr_tags) { struct blk_mq_tag_set *set = hctx->queue->tag_set; struct blk_mq_tags *new; - bool ret; if (!can_grow) return -EINVAL; @@ -604,15 +603,9 @@ int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx, if (tdepth > MAX_SCHED_RQ) return -EINVAL; - new = blk_mq_alloc_rq_map(set, hctx->queue_num, tdepth, - tags->nr_reserved_tags, set->flags); + new = blk_mq_alloc_map_and_rqs(set, hctx->queue_num, tdepth); if (!new) return -ENOMEM; - ret = blk_mq_alloc_rqs(set, new, hctx->queue_num, tdepth); - if (ret) { - blk_mq_free_rq_map(new, set->flags); - return -ENOMEM; - } blk_mq_free_rqs(set, *tagsptr, hctx->queue_num); blk_mq_free_rq_map(*tagsptr, set->flags); diff --git a/block/blk-mq.c b/block/blk-mq.c index 5fec444d6399..46772773b9c4 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2383,11 +2383,11 @@ void blk_mq_free_rq_map(struct blk_mq_tags *tags, unsigned int flags) blk_mq_free_tags(tags, flags); } -struct blk_mq_tags *blk_mq_alloc_rq_map(struct blk_mq_tag_set *set, - unsigned int hctx_idx, - unsigned int nr_tags, - unsigned int reserved_tags, - unsigned int flags) +static struct blk_mq_tags *blk_mq_alloc_rq_map(struct blk_mq_tag_set *set, + unsigned int hctx_idx, + unsigned int nr_tags, + unsigned int reserved_tags, + unsigned int flags) { struct blk_mq_tags *tags; int node; @@ -2435,8 +2435,9 @@ static int blk_mq_init_request(struct blk_mq_tag_set *set, struct request *rq, return 0; } -int blk_mq_alloc_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags, - unsigned int hctx_idx, unsigned int depth) +static int blk_mq_alloc_rqs(struct blk_mq_tag_set *set, + struct blk_mq_tags *tags, + unsigned int hctx_idx, unsigned int depth) { unsigned int i, j, entries_per_page, max_order = 4; size_t rq_size, left; @@ -2847,25 +2848,34 @@ static void blk_mq_init_cpu_queues(struct request_queue *q, } } -static bool __blk_mq_alloc_map_and_request(struct blk_mq_tag_set *set, - int hctx_idx) +struct blk_mq_tags *blk_mq_alloc_map_and_rqs(struct blk_mq_tag_set *set, + unsigned int hctx_idx, + unsigned int depth) { - unsigned int flags = set->flags; - int ret = 0; + struct blk_mq_tags *tags; + int ret; - set->tags[hctx_idx] = blk_mq_alloc_rq_map(set, hctx_idx, - set->queue_depth, set->reserved_tags, flags); - if (!set->tags[hctx_idx]) - return false; + tags = blk_mq_alloc_rq_map(set, hctx_idx, depth, set->reserved_tags, + set->flags); + if (!tags) + return NULL; - ret = blk_mq_alloc_rqs(set, set->tags[hctx_idx], hctx_idx, - set->queue_depth); - if (!ret) - return true; + ret = blk_mq_alloc_rqs(set, tags, hctx_idx, depth); + if (ret) { + blk_mq_free_rq_map(tags, set->flags); + return NULL; + } - blk_mq_free_rq_map(set->tags[hctx_idx], flags); - set->tags[hctx_idx] = NULL; - return false; + return tags; +} + +static bool __blk_mq_alloc_map_and_rqs(struct blk_mq_tag_set *set, + int hctx_idx) +{ + set->tags[hctx_idx] = blk_mq_alloc_map_and_rqs(set, hctx_idx, + set->queue_depth); + + return set->tags[hctx_idx]; } static void blk_mq_free_map_and_requests(struct blk_mq_tag_set *set, @@ -2910,7 +2920,7 @@ static void blk_mq_map_swqueue(struct request_queue *q) hctx_idx = set->map[j].mq_map[i]; /* unmapped hw queue can be remapped after CPU topo changed */ if (!set->tags[hctx_idx] && - !__blk_mq_alloc_map_and_request(set, hctx_idx)) { + !__blk_mq_alloc_map_and_rqs(set, hctx_idx)) { /* * If tags initialization fail for some hctx, * that hctx won't be brought online. In this @@ -3343,7 +3353,7 @@ static int __blk_mq_alloc_rq_maps(struct blk_mq_tag_set *set) int i; for (i = 0; i < set->nr_hw_queues; i++) { - if (!__blk_mq_alloc_map_and_request(set, i)) + if (!__blk_mq_alloc_map_and_rqs(set, i)) goto out_unwind; cond_resched(); } @@ -3362,7 +3372,7 @@ static int __blk_mq_alloc_rq_maps(struct blk_mq_tag_set *set) * may reduce the depth asked for, if memory is tight. set->queue_depth * will be updated to reflect the allocated depth. */ -static int blk_mq_alloc_map_and_requests(struct blk_mq_tag_set *set) +static int blk_mq_alloc_set_map_and_rqs(struct blk_mq_tag_set *set) { unsigned int depth; int err; @@ -3528,7 +3538,7 @@ int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set) if (ret) goto out_free_mq_map; - ret = blk_mq_alloc_map_and_requests(set); + ret = blk_mq_alloc_set_map_and_rqs(set); if (ret) goto out_free_mq_map; diff --git a/block/blk-mq.h b/block/blk-mq.h index d08779f77a26..83585a344568 100644 --- a/block/blk-mq.h +++ b/block/blk-mq.h @@ -55,13 +55,8 @@ void blk_mq_put_rq_ref(struct request *rq); void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags, unsigned int hctx_idx); void blk_mq_free_rq_map(struct blk_mq_tags *tags, unsigned int flags); -struct blk_mq_tags *blk_mq_alloc_rq_map(struct blk_mq_tag_set *set, - unsigned int hctx_idx, - unsigned int nr_tags, - unsigned int reserved_tags, - unsigned int flags); -int blk_mq_alloc_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags, - unsigned int hctx_idx, unsigned int depth); +struct blk_mq_tags *blk_mq_alloc_map_and_rqs(struct blk_mq_tag_set *set, + unsigned int hctx_idx, unsigned int depth); /* * Internal helpers for request insertion into sw queues From patchwork Fri Sep 24 08:28:28 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 12514507 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0A551C433EF for ; Fri, 24 Sep 2021 08:34:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ED241610CF for ; Fri, 24 Sep 2021 08:34:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244838AbhIXIfx (ORCPT ); Fri, 24 Sep 2021 04:35:53 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:3865 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244897AbhIXIf2 (ORCPT ); Fri, 24 Sep 2021 04:35:28 -0400 Received: from fraeml707-chm.china.huawei.com (unknown [172.18.147.226]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4HG4xp3TXxz67kg2; Fri, 24 Sep 2021 16:31:26 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml707-chm.china.huawei.com (10.206.15.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 10:33:53 +0200 Received: from localhost.localdomain (10.69.192.58) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 09:33:51 +0100 From: John Garry To: CC: , , , , , "John Garry" Subject: [PATCH v4 11/13] blk-mq: Refactor and rename blk_mq_free_map_and_{requests->rqs}() Date: Fri, 24 Sep 2021 16:28:28 +0800 Message-ID: <1632472110-244938-12-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1632472110-244938-1-git-send-email-john.garry@huawei.com> References: <1632472110-244938-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Refactor blk_mq_free_map_and_requests() such that it can be used at many sites at which the tag map and rqs are freed. Also rename to blk_mq_free_map_and_rqs(), which is shorter and matches the alloc equivalent. Suggested-by: Ming Lei Signed-off-by: John Garry Reviewed-by: Hannes Reinecke --- block/blk-mq-tag.c | 3 +-- block/blk-mq.c | 40 ++++++++++++++++++++++++---------------- block/blk-mq.h | 4 +++- 3 files changed, 28 insertions(+), 19 deletions(-) diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index db99f1246795..a0ecc6d88f84 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c @@ -607,8 +607,7 @@ int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx, if (!new) return -ENOMEM; - blk_mq_free_rqs(set, *tagsptr, hctx->queue_num); - blk_mq_free_rq_map(*tagsptr, set->flags); + blk_mq_free_map_and_rqs(set, *tagsptr, hctx->queue_num); *tagsptr = new; } else { /* diff --git a/block/blk-mq.c b/block/blk-mq.c index 46772773b9c4..464ea20b9bcb 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2878,15 +2878,15 @@ static bool __blk_mq_alloc_map_and_rqs(struct blk_mq_tag_set *set, return set->tags[hctx_idx]; } -static void blk_mq_free_map_and_requests(struct blk_mq_tag_set *set, - unsigned int hctx_idx) +void blk_mq_free_map_and_rqs(struct blk_mq_tag_set *set, + struct blk_mq_tags *tags, + unsigned int hctx_idx) { unsigned int flags = set->flags; - if (set->tags && set->tags[hctx_idx]) { - blk_mq_free_rqs(set, set->tags[hctx_idx], hctx_idx); - blk_mq_free_rq_map(set->tags[hctx_idx], flags); - set->tags[hctx_idx] = NULL; + if (tags) { + blk_mq_free_rqs(set, tags, hctx_idx); + blk_mq_free_rq_map(tags, flags); } } @@ -2967,8 +2967,10 @@ static void blk_mq_map_swqueue(struct request_queue *q) * fallback in case of a new remap fails * allocation */ - if (i && set->tags[i]) - blk_mq_free_map_and_requests(set, i); + if (i && set->tags[i]) { + blk_mq_free_map_and_rqs(set, set->tags[i], i); + set->tags[i] = NULL; + } hctx->tags = NULL; continue; @@ -3264,8 +3266,8 @@ static void blk_mq_realloc_hw_ctxs(struct blk_mq_tag_set *set, struct blk_mq_hw_ctx *hctx = hctxs[j]; if (hctx) { - if (hctx->tags) - blk_mq_free_map_and_requests(set, j); + blk_mq_free_map_and_rqs(set, set->tags[j], j); + set->tags[j] = NULL; blk_mq_exit_hctx(q, set, hctx, j); hctxs[j] = NULL; } @@ -3361,8 +3363,10 @@ static int __blk_mq_alloc_rq_maps(struct blk_mq_tag_set *set) return 0; out_unwind: - while (--i >= 0) - blk_mq_free_map_and_requests(set, i); + while (--i >= 0) { + blk_mq_free_map_and_rqs(set, set->tags[i], i); + set->tags[i] = NULL; + } return -ENOMEM; } @@ -3557,8 +3561,10 @@ int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set) return 0; out_free_mq_rq_maps: - for (i = 0; i < set->nr_hw_queues; i++) - blk_mq_free_map_and_requests(set, i); + for (i = 0; i < set->nr_hw_queues; i++) { + blk_mq_free_map_and_rqs(set, set->tags[i], i); + set->tags[i] = NULL; + } out_free_mq_map: for (i = 0; i < set->nr_maps; i++) { kfree(set->map[i].mq_map); @@ -3590,8 +3596,10 @@ void blk_mq_free_tag_set(struct blk_mq_tag_set *set) { int i, j; - for (i = 0; i < set->nr_hw_queues; i++) - blk_mq_free_map_and_requests(set, i); + for (i = 0; i < set->nr_hw_queues; i++) { + blk_mq_free_map_and_rqs(set, set->tags[i], i); + set->tags[i] = NULL; + } if (blk_mq_is_sbitmap_shared(set->flags)) blk_mq_exit_shared_sbitmap(set); diff --git a/block/blk-mq.h b/block/blk-mq.h index 83585a344568..bcb0ca89d37a 100644 --- a/block/blk-mq.h +++ b/block/blk-mq.h @@ -57,7 +57,9 @@ void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags, void blk_mq_free_rq_map(struct blk_mq_tags *tags, unsigned int flags); struct blk_mq_tags *blk_mq_alloc_map_and_rqs(struct blk_mq_tag_set *set, unsigned int hctx_idx, unsigned int depth); - +void blk_mq_free_map_and_rqs(struct blk_mq_tag_set *set, + struct blk_mq_tags *tags, + unsigned int hctx_idx); /* * Internal helpers for request insertion into sw queues */ From patchwork Fri Sep 24 08:28:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 12514509 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7B871C433FE for ; Fri, 24 Sep 2021 08:34:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 63A236124F for ; 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Fri, 24 Sep 2021 09:33:53 +0100 From: John Garry To: CC: , , , , , "John Garry" Subject: [PATCH v4 12/13] blk-mq: Use shared tags for shared sbitmap support Date: Fri, 24 Sep 2021 16:28:29 +0800 Message-ID: <1632472110-244938-13-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1632472110-244938-1-git-send-email-john.garry@huawei.com> References: <1632472110-244938-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Currently we use separate sbitmap pairs and active_queues atomic_t for shared sbitmap support. However a full sets of static requests are used per HW queue, which is quite wasteful, considering that the total number of requests usable at any given time across all HW queues is limited by the shared sbitmap depth. As such, it is considerably more memory efficient in the case of shared sbitmap to allocate a set of static rqs per tag set or request queue, and not per HW queue. So replace the sbitmap pairs and active_queues atomic_t with a shared tags per tagset and request queue, which will hold a set of shared static rqs. Since there is now no valid HW queue index to be passed to the blk_mq_ops .init and .exit_request callbacks, pass an invalid index token. This changes the semantics of the APIs, such that the callback would need to validate the HW queue index before using it. Currently no user of shared sbitmap actually uses the HW queue index (as would be expected). Continue to use term "shared sbitmap" for now, as the meaning is known. Signed-off-by: John Garry Reviewed-by: Ming Lei --- block/blk-mq-sched.c | 82 ++++++++++++++++++------------------- block/blk-mq-tag.c | 61 ++++++++++------------------ block/blk-mq-tag.h | 6 +-- block/blk-mq.c | 91 +++++++++++++++++++++++------------------- block/blk-mq.h | 5 ++- include/linux/blk-mq.h | 15 ++++--- include/linux/blkdev.h | 3 +- 7 files changed, 125 insertions(+), 138 deletions(-) diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c index d1b56bb9ac64..428da4949d80 100644 --- a/block/blk-mq-sched.c +++ b/block/blk-mq-sched.c @@ -519,6 +519,11 @@ static int blk_mq_sched_alloc_map_and_rqs(struct request_queue *q, struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx) { + if (blk_mq_is_sbitmap_shared(q->tag_set->flags)) { + hctx->sched_tags = q->shared_sbitmap_tags; + return 0; + } + hctx->sched_tags = blk_mq_alloc_map_and_rqs(q->tag_set, hctx_idx, q->nr_requests); @@ -527,61 +532,54 @@ static int blk_mq_sched_alloc_map_and_rqs(struct request_queue *q, return 0; } +static void blk_mq_exit_sched_shared_sbitmap(struct request_queue *queue) +{ + blk_mq_free_rq_map(queue->shared_sbitmap_tags); + queue->shared_sbitmap_tags = NULL; +} + /* called in queue's release handler, tagset has gone away */ -static void blk_mq_sched_tags_teardown(struct request_queue *q) +static void blk_mq_sched_tags_teardown(struct request_queue *q, unsigned int flags) { struct blk_mq_hw_ctx *hctx; int i; queue_for_each_hw_ctx(q, hctx, i) { if (hctx->sched_tags) { - blk_mq_free_rq_map(hctx->sched_tags, hctx->flags); + if (!blk_mq_is_sbitmap_shared(q->tag_set->flags)) + blk_mq_free_rq_map(hctx->sched_tags); hctx->sched_tags = NULL; } } + + if (blk_mq_is_sbitmap_shared(flags)) + blk_mq_exit_sched_shared_sbitmap(q); } static int blk_mq_init_sched_shared_sbitmap(struct request_queue *queue) { struct blk_mq_tag_set *set = queue->tag_set; - int alloc_policy = BLK_MQ_FLAG_TO_ALLOC_POLICY(set->flags); - struct blk_mq_hw_ctx *hctx; - int ret, i; /* * Set initial depth at max so that we don't need to reallocate for * updating nr_requests. */ - ret = blk_mq_init_bitmaps(&queue->sched_bitmap_tags, - &queue->sched_breserved_tags, - MAX_SCHED_RQ, set->reserved_tags, - set->numa_node, alloc_policy); - if (ret) - return ret; - - queue_for_each_hw_ctx(queue, hctx, i) { - hctx->sched_tags->bitmap_tags = - &queue->sched_bitmap_tags; - hctx->sched_tags->breserved_tags = - &queue->sched_breserved_tags; - } + queue->shared_sbitmap_tags = blk_mq_alloc_map_and_rqs(set, + BLK_MQ_NO_HCTX_IDX, + MAX_SCHED_RQ); + if (!queue->shared_sbitmap_tags) + return -ENOMEM; blk_mq_tag_update_sched_shared_sbitmap(queue); return 0; } -static void blk_mq_exit_sched_shared_sbitmap(struct request_queue *queue) -{ - sbitmap_queue_free(&queue->sched_bitmap_tags); - sbitmap_queue_free(&queue->sched_breserved_tags); -} - int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e) { + unsigned int i, flags = q->tag_set->flags; struct blk_mq_hw_ctx *hctx; struct elevator_queue *eq; - unsigned int i; int ret; if (!e) { @@ -598,21 +596,21 @@ int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e) q->nr_requests = 2 * min_t(unsigned int, q->tag_set->queue_depth, BLKDEV_DEFAULT_RQ); - queue_for_each_hw_ctx(q, hctx, i) { - ret = blk_mq_sched_alloc_map_and_rqs(q, hctx, i); + if (blk_mq_is_sbitmap_shared(flags)) { + ret = blk_mq_init_sched_shared_sbitmap(q); if (ret) - goto err_free_map_and_rqs; + return ret; } - if (blk_mq_is_sbitmap_shared(q->tag_set->flags)) { - ret = blk_mq_init_sched_shared_sbitmap(q); + queue_for_each_hw_ctx(q, hctx, i) { + ret = blk_mq_sched_alloc_map_and_rqs(q, hctx, i); if (ret) goto err_free_map_and_rqs; } ret = e->ops.init_sched(q, e); if (ret) - goto err_free_sbitmap; + goto err_free_map_and_rqs; blk_mq_debugfs_register_sched(q); @@ -632,12 +630,10 @@ int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e) return 0; -err_free_sbitmap: - if (blk_mq_is_sbitmap_shared(q->tag_set->flags)) - blk_mq_exit_sched_shared_sbitmap(q); err_free_map_and_rqs: blk_mq_sched_free_rqs(q); - blk_mq_sched_tags_teardown(q); + blk_mq_sched_tags_teardown(q, flags); + q->elevator = NULL; return ret; } @@ -651,9 +647,15 @@ void blk_mq_sched_free_rqs(struct request_queue *q) struct blk_mq_hw_ctx *hctx; int i; - queue_for_each_hw_ctx(q, hctx, i) { - if (hctx->sched_tags) - blk_mq_free_rqs(q->tag_set, hctx->sched_tags, i); + if (blk_mq_is_sbitmap_shared(q->tag_set->flags)) { + blk_mq_free_rqs(q->tag_set, q->shared_sbitmap_tags, + BLK_MQ_NO_HCTX_IDX); + } else { + queue_for_each_hw_ctx(q, hctx, i) { + if (hctx->sched_tags) + blk_mq_free_rqs(q->tag_set, + hctx->sched_tags, i); + } } } @@ -674,8 +676,6 @@ void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e) blk_mq_debugfs_unregister_sched(q); if (e->type->ops.exit_sched) e->type->ops.exit_sched(e); - blk_mq_sched_tags_teardown(q); - if (blk_mq_is_sbitmap_shared(flags)) - blk_mq_exit_sched_shared_sbitmap(q); + blk_mq_sched_tags_teardown(q, flags); q->elevator = NULL; } diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index a0ecc6d88f84..4e71ce6b37ea 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c @@ -27,10 +27,11 @@ bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx) if (blk_mq_is_sbitmap_shared(hctx->flags)) { struct request_queue *q = hctx->queue; struct blk_mq_tag_set *set = q->tag_set; + struct blk_mq_tags *tags = set->shared_sbitmap_tags; if (!test_bit(QUEUE_FLAG_HCTX_ACTIVE, &q->queue_flags) && !test_and_set_bit(QUEUE_FLAG_HCTX_ACTIVE, &q->queue_flags)) - atomic_inc(&set->active_queues_shared_sbitmap); + atomic_inc(&tags->active_queues); } else { if (!test_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state) && !test_and_set_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state)) @@ -61,10 +62,12 @@ void __blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx) struct blk_mq_tag_set *set = q->tag_set; if (blk_mq_is_sbitmap_shared(hctx->flags)) { + struct blk_mq_tags *tags = set->shared_sbitmap_tags; + if (!test_and_clear_bit(QUEUE_FLAG_HCTX_ACTIVE, &q->queue_flags)) return; - atomic_dec(&set->active_queues_shared_sbitmap); + atomic_dec(&tags->active_queues); } else { if (!test_and_clear_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state)) return; @@ -510,38 +513,10 @@ static int blk_mq_init_bitmap_tags(struct blk_mq_tags *tags, return 0; } -int blk_mq_init_shared_sbitmap(struct blk_mq_tag_set *set) -{ - int alloc_policy = BLK_MQ_FLAG_TO_ALLOC_POLICY(set->flags); - int i, ret; - - ret = blk_mq_init_bitmaps(&set->__bitmap_tags, &set->__breserved_tags, - set->queue_depth, set->reserved_tags, - set->numa_node, alloc_policy); - if (ret) - return ret; - - for (i = 0; i < set->nr_hw_queues; i++) { - struct blk_mq_tags *tags = set->tags[i]; - - tags->bitmap_tags = &set->__bitmap_tags; - tags->breserved_tags = &set->__breserved_tags; - } - - return 0; -} - -void blk_mq_exit_shared_sbitmap(struct blk_mq_tag_set *set) -{ - sbitmap_queue_free(&set->__bitmap_tags); - sbitmap_queue_free(&set->__breserved_tags); -} - struct blk_mq_tags *blk_mq_init_tags(unsigned int total_tags, unsigned int reserved_tags, - int node, unsigned int flags) + int node, int alloc_policy) { - int alloc_policy = BLK_MQ_FLAG_TO_ALLOC_POLICY(flags); struct blk_mq_tags *tags; if (total_tags > BLK_MQ_TAG_MAX) { @@ -557,9 +532,6 @@ struct blk_mq_tags *blk_mq_init_tags(unsigned int total_tags, tags->nr_reserved_tags = reserved_tags; spin_lock_init(&tags->lock); - if (blk_mq_is_sbitmap_shared(flags)) - return tags; - if (blk_mq_init_bitmap_tags(tags, node, alloc_policy) < 0) { kfree(tags); return NULL; @@ -567,12 +539,10 @@ struct blk_mq_tags *blk_mq_init_tags(unsigned int total_tags, return tags; } -void blk_mq_free_tags(struct blk_mq_tags *tags, unsigned int flags) +void blk_mq_free_tags(struct blk_mq_tags *tags) { - if (!blk_mq_is_sbitmap_shared(flags)) { - sbitmap_queue_free(tags->bitmap_tags); - sbitmap_queue_free(tags->breserved_tags); - } + sbitmap_queue_free(tags->bitmap_tags); + sbitmap_queue_free(tags->breserved_tags); kfree(tags); } @@ -603,6 +573,13 @@ int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx, if (tdepth > MAX_SCHED_RQ) return -EINVAL; + /* + * Only the sbitmap needs resizing since we allocated the max + * initially. + */ + if (blk_mq_is_sbitmap_shared(set->flags)) + return 0; + new = blk_mq_alloc_map_and_rqs(set, hctx->queue_num, tdepth); if (!new) return -ENOMEM; @@ -623,12 +600,14 @@ int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx, void blk_mq_tag_resize_shared_sbitmap(struct blk_mq_tag_set *set, unsigned int size) { - sbitmap_queue_resize(&set->__bitmap_tags, size - set->reserved_tags); + struct blk_mq_tags *tags = set->shared_sbitmap_tags; + + sbitmap_queue_resize(&tags->__bitmap_tags, size - set->reserved_tags); } void blk_mq_tag_update_sched_shared_sbitmap(struct request_queue *q) { - sbitmap_queue_resize(&q->sched_bitmap_tags, + sbitmap_queue_resize(q->shared_sbitmap_tags->bitmap_tags, q->nr_requests - q->tag_set->reserved_tags); } diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h index 88f3c6485543..e433e39a9cfa 100644 --- a/block/blk-mq-tag.h +++ b/block/blk-mq-tag.h @@ -30,16 +30,14 @@ struct blk_mq_tags { extern struct blk_mq_tags *blk_mq_init_tags(unsigned int nr_tags, unsigned int reserved_tags, - int node, unsigned int flags); -extern void blk_mq_free_tags(struct blk_mq_tags *tags, unsigned int flags); + int node, int alloc_policy); +extern void blk_mq_free_tags(struct blk_mq_tags *tags); extern int blk_mq_init_bitmaps(struct sbitmap_queue *bitmap_tags, struct sbitmap_queue *breserved_tags, unsigned int queue_depth, unsigned int reserved, int node, int alloc_policy); -extern int blk_mq_init_shared_sbitmap(struct blk_mq_tag_set *set); -extern void blk_mq_exit_shared_sbitmap(struct blk_mq_tag_set *set); extern unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data); extern void blk_mq_put_tag(struct blk_mq_tags *tags, struct blk_mq_ctx *ctx, unsigned int tag); diff --git a/block/blk-mq.c b/block/blk-mq.c index 464ea20b9bcb..ece43855bcdf 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2344,7 +2344,10 @@ void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags, struct blk_mq_tags *drv_tags; struct page *page; - drv_tags = set->tags[hctx_idx]; + if (blk_mq_is_sbitmap_shared(set->flags)) + drv_tags = set->shared_sbitmap_tags; + else + drv_tags = set->tags[hctx_idx]; if (tags->static_rqs && set->ops->exit_request) { int i; @@ -2373,21 +2376,20 @@ void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags, } } -void blk_mq_free_rq_map(struct blk_mq_tags *tags, unsigned int flags) +void blk_mq_free_rq_map(struct blk_mq_tags *tags) { kfree(tags->rqs); tags->rqs = NULL; kfree(tags->static_rqs); tags->static_rqs = NULL; - blk_mq_free_tags(tags, flags); + blk_mq_free_tags(tags); } static struct blk_mq_tags *blk_mq_alloc_rq_map(struct blk_mq_tag_set *set, unsigned int hctx_idx, unsigned int nr_tags, - unsigned int reserved_tags, - unsigned int flags) + unsigned int reserved_tags) { struct blk_mq_tags *tags; int node; @@ -2396,7 +2398,8 @@ static struct blk_mq_tags *blk_mq_alloc_rq_map(struct blk_mq_tag_set *set, if (node == NUMA_NO_NODE) node = set->numa_node; - tags = blk_mq_init_tags(nr_tags, reserved_tags, node, flags); + tags = blk_mq_init_tags(nr_tags, reserved_tags, node, + BLK_MQ_FLAG_TO_ALLOC_POLICY(set->flags)); if (!tags) return NULL; @@ -2404,7 +2407,7 @@ static struct blk_mq_tags *blk_mq_alloc_rq_map(struct blk_mq_tag_set *set, GFP_NOIO | __GFP_NOWARN | __GFP_NORETRY, node); if (!tags->rqs) { - blk_mq_free_tags(tags, flags); + blk_mq_free_tags(tags); return NULL; } @@ -2413,7 +2416,7 @@ static struct blk_mq_tags *blk_mq_alloc_rq_map(struct blk_mq_tag_set *set, node); if (!tags->static_rqs) { kfree(tags->rqs); - blk_mq_free_tags(tags, flags); + blk_mq_free_tags(tags); return NULL; } @@ -2855,14 +2858,13 @@ struct blk_mq_tags *blk_mq_alloc_map_and_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags; int ret; - tags = blk_mq_alloc_rq_map(set, hctx_idx, depth, set->reserved_tags, - set->flags); + tags = blk_mq_alloc_rq_map(set, hctx_idx, depth, set->reserved_tags); if (!tags) return NULL; ret = blk_mq_alloc_rqs(set, tags, hctx_idx, depth); if (ret) { - blk_mq_free_rq_map(tags, set->flags); + blk_mq_free_rq_map(tags); return NULL; } @@ -2872,6 +2874,12 @@ struct blk_mq_tags *blk_mq_alloc_map_and_rqs(struct blk_mq_tag_set *set, static bool __blk_mq_alloc_map_and_rqs(struct blk_mq_tag_set *set, int hctx_idx) { + if (blk_mq_is_sbitmap_shared(set->flags)) { + set->tags[hctx_idx] = set->shared_sbitmap_tags; + + return true; + } + set->tags[hctx_idx] = blk_mq_alloc_map_and_rqs(set, hctx_idx, set->queue_depth); @@ -2882,14 +2890,22 @@ void blk_mq_free_map_and_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags, unsigned int hctx_idx) { - unsigned int flags = set->flags; - if (tags) { blk_mq_free_rqs(set, tags, hctx_idx); - blk_mq_free_rq_map(tags, flags); + blk_mq_free_rq_map(tags); } } +static void __blk_mq_free_map_and_rqs(struct blk_mq_tag_set *set, + struct blk_mq_tags *tags, + unsigned int hctx_idx) +{ + if (blk_mq_is_sbitmap_shared(set->flags)) + return; + + blk_mq_free_map_and_rqs(set, tags, hctx_idx); +} + static void blk_mq_map_swqueue(struct request_queue *q) { unsigned int i, j, hctx_idx; @@ -2968,7 +2984,7 @@ static void blk_mq_map_swqueue(struct request_queue *q) * allocation */ if (i && set->tags[i]) { - blk_mq_free_map_and_rqs(set, set->tags[i], i); + __blk_mq_free_map_and_rqs(set, set->tags[i], i); set->tags[i] = NULL; } @@ -3266,7 +3282,7 @@ static void blk_mq_realloc_hw_ctxs(struct blk_mq_tag_set *set, struct blk_mq_hw_ctx *hctx = hctxs[j]; if (hctx) { - blk_mq_free_map_and_rqs(set, set->tags[j], j); + __blk_mq_free_map_and_rqs(set, set->tags[j], j); set->tags[j] = NULL; blk_mq_exit_hctx(q, set, hctx, j); hctxs[j] = NULL; @@ -3354,6 +3370,14 @@ static int __blk_mq_alloc_rq_maps(struct blk_mq_tag_set *set) { int i; + if (blk_mq_is_sbitmap_shared(set->flags)) { + set->shared_sbitmap_tags = blk_mq_alloc_map_and_rqs(set, + BLK_MQ_NO_HCTX_IDX, + set->queue_depth); + if (!set->shared_sbitmap_tags) + return -ENOMEM; + } + for (i = 0; i < set->nr_hw_queues; i++) { if (!__blk_mq_alloc_map_and_rqs(set, i)) goto out_unwind; @@ -3364,10 +3388,15 @@ static int __blk_mq_alloc_rq_maps(struct blk_mq_tag_set *set) out_unwind: while (--i >= 0) { - blk_mq_free_map_and_rqs(set, set->tags[i], i); + __blk_mq_free_map_and_rqs(set, set->tags[i], i); set->tags[i] = NULL; } + if (blk_mq_is_sbitmap_shared(set->flags)) { + blk_mq_free_map_and_rqs(set, set->shared_sbitmap_tags, + BLK_MQ_NO_HCTX_IDX); + } + return -ENOMEM; } @@ -3546,25 +3575,11 @@ int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set) if (ret) goto out_free_mq_map; - if (blk_mq_is_sbitmap_shared(set->flags)) { - atomic_set(&set->active_queues_shared_sbitmap, 0); - - if (blk_mq_init_shared_sbitmap(set)) { - ret = -ENOMEM; - goto out_free_mq_rq_maps; - } - } - mutex_init(&set->tag_list_lock); INIT_LIST_HEAD(&set->tag_list); return 0; -out_free_mq_rq_maps: - for (i = 0; i < set->nr_hw_queues; i++) { - blk_mq_free_map_and_rqs(set, set->tags[i], i); - set->tags[i] = NULL; - } out_free_mq_map: for (i = 0; i < set->nr_maps; i++) { kfree(set->map[i].mq_map); @@ -3597,12 +3612,14 @@ void blk_mq_free_tag_set(struct blk_mq_tag_set *set) int i, j; for (i = 0; i < set->nr_hw_queues; i++) { - blk_mq_free_map_and_rqs(set, set->tags[i], i); + __blk_mq_free_map_and_rqs(set, set->tags[i], i); set->tags[i] = NULL; } - if (blk_mq_is_sbitmap_shared(set->flags)) - blk_mq_exit_shared_sbitmap(set); + if (blk_mq_is_sbitmap_shared(set->flags)) { + blk_mq_free_map_and_rqs(set, set->shared_sbitmap_tags, + BLK_MQ_NO_HCTX_IDX); + } for (j = 0; j < set->nr_maps; j++) { kfree(set->map[j].mq_map); @@ -3640,12 +3657,6 @@ int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr) if (hctx->sched_tags) { ret = blk_mq_tag_update_depth(hctx, &hctx->sched_tags, nr, true); - if (blk_mq_is_sbitmap_shared(set->flags)) { - hctx->sched_tags->bitmap_tags = - &q->sched_bitmap_tags; - hctx->sched_tags->breserved_tags = - &q->sched_breserved_tags; - } } else { ret = blk_mq_tag_update_depth(hctx, &hctx->tags, nr, false); diff --git a/block/blk-mq.h b/block/blk-mq.h index bcb0ca89d37a..b34385211e0a 100644 --- a/block/blk-mq.h +++ b/block/blk-mq.h @@ -54,7 +54,7 @@ void blk_mq_put_rq_ref(struct request *rq); */ void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags, unsigned int hctx_idx); -void blk_mq_free_rq_map(struct blk_mq_tags *tags, unsigned int flags); +void blk_mq_free_rq_map(struct blk_mq_tags *tags); struct blk_mq_tags *blk_mq_alloc_map_and_rqs(struct blk_mq_tag_set *set, unsigned int hctx_idx, unsigned int depth); void blk_mq_free_map_and_rqs(struct blk_mq_tag_set *set, @@ -331,10 +331,11 @@ static inline bool hctx_may_queue(struct blk_mq_hw_ctx *hctx, if (blk_mq_is_sbitmap_shared(hctx->flags)) { struct request_queue *q = hctx->queue; struct blk_mq_tag_set *set = q->tag_set; + struct blk_mq_tags *tags = set->shared_sbitmap_tags; if (!test_bit(QUEUE_FLAG_HCTX_ACTIVE, &q->queue_flags)) return true; - users = atomic_read(&set->active_queues_shared_sbitmap); + users = atomic_read(&tags->active_queues); } else { if (!test_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state)) return true; diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 13ba1861e688..808854a8ebc4 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -232,13 +232,11 @@ enum hctx_type { * @flags: Zero or more BLK_MQ_F_* flags. * @driver_data: Pointer to data owned by the block driver that created this * tag set. - * @active_queues_shared_sbitmap: - * number of active request queues per tag set. - * @__bitmap_tags: A shared tags sbitmap, used over all hctx's - * @__breserved_tags: - * A shared reserved tags sbitmap, used over all hctx's * @tags: Tag sets. One tag set per hardware queue. Has @nr_hw_queues * elements. + * @shared_sbitmap_tags: + * Shared sbitmap set of tags. Has @nr_hw_queues elements. If + * set, shared by all @tags. * @tag_list_lock: Serializes tag_list accesses. * @tag_list: List of the request queues that use this tag set. See also * request_queue.tag_set_list. @@ -255,12 +253,11 @@ struct blk_mq_tag_set { unsigned int timeout; unsigned int flags; void *driver_data; - atomic_t active_queues_shared_sbitmap; - struct sbitmap_queue __bitmap_tags; - struct sbitmap_queue __breserved_tags; struct blk_mq_tags **tags; + struct blk_mq_tags *shared_sbitmap_tags; + struct mutex tag_list_lock; struct list_head tag_list; }; @@ -432,6 +429,8 @@ enum { ((policy & ((1 << BLK_MQ_F_ALLOC_POLICY_BITS) - 1)) \ << BLK_MQ_F_ALLOC_POLICY_START_BIT) +#define BLK_MQ_NO_HCTX_IDX (-1U) + struct gendisk *__blk_mq_alloc_disk(struct blk_mq_tag_set *set, void *queuedata, struct lock_class_key *lkclass); #define blk_mq_alloc_disk(set, queuedata) \ diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 4baf9435232d..17e50e5ef47b 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -459,8 +459,7 @@ struct request_queue { atomic_t nr_active_requests_shared_sbitmap; - struct sbitmap_queue sched_bitmap_tags; - struct sbitmap_queue sched_breserved_tags; + struct blk_mq_tags *shared_sbitmap_tags; struct list_head icq_list; #ifdef CONFIG_BLK_CGROUP From patchwork Fri Sep 24 08:28:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 12514511 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7A3C1C4332F for ; Fri, 24 Sep 2021 08:34:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 67833610CF for ; Fri, 24 Sep 2021 08:34:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245007AbhIXIgB (ORCPT ); Fri, 24 Sep 2021 04:36:01 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:3867 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244892AbhIXIfc (ORCPT ); Fri, 24 Sep 2021 04:35:32 -0400 Received: from fraeml706-chm.china.huawei.com (unknown [172.18.147.226]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4HG4xQ21N9z67xS9; Fri, 24 Sep 2021 16:31:06 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml706-chm.china.huawei.com (10.206.15.55) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.8; Fri, 24 Sep 2021 10:33:57 +0200 Received: from localhost.localdomain (10.69.192.58) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 24 Sep 2021 09:33:55 +0100 From: John Garry To: CC: , , , , , "John Garry" Subject: [PATCH v4 13/13] blk-mq: Stop using pointers for blk_mq_tags bitmap tags Date: Fri, 24 Sep 2021 16:28:30 +0800 Message-ID: <1632472110-244938-14-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1632472110-244938-1-git-send-email-john.garry@huawei.com> References: <1632472110-244938-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Now that we use shared tags for shared sbitmap support, we don't require the tags sbitmap pointers, so drop them. This essentially reverts commit 222a5ae03cdd ("blk-mq: Use pointers for blk_mq_tags bitmap tags"). Function blk_mq_init_bitmap_tags() is removed also, since it would be only a wrappper for blk_mq_init_bitmaps(). Reviewed-by: Ming Lei Reviewed-by: Hannes Reinecke Signed-off-by: John Garry --- block/bfq-iosched.c | 4 +-- block/blk-mq-debugfs.c | 8 +++--- block/blk-mq-tag.c | 56 +++++++++++++++--------------------------- block/blk-mq-tag.h | 7 ++---- block/blk-mq.c | 8 +++--- block/kyber-iosched.c | 4 +-- block/mq-deadline.c | 2 +- 7 files changed, 35 insertions(+), 54 deletions(-) diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c index dd13c2bbc29c..4674f85d7df0 100644 --- a/block/bfq-iosched.c +++ b/block/bfq-iosched.c @@ -6894,8 +6894,8 @@ static void bfq_depth_updated(struct blk_mq_hw_ctx *hctx) struct blk_mq_tags *tags = hctx->sched_tags; unsigned int min_shallow; - min_shallow = bfq_update_depths(bfqd, tags->bitmap_tags); - sbitmap_queue_min_shallow_depth(tags->bitmap_tags, min_shallow); + min_shallow = bfq_update_depths(bfqd, &tags->bitmap_tags); + sbitmap_queue_min_shallow_depth(&tags->bitmap_tags, min_shallow); } static int bfq_init_hctx(struct blk_mq_hw_ctx *hctx, unsigned int index) diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c index 4b66d2776eda..4000376330c9 100644 --- a/block/blk-mq-debugfs.c +++ b/block/blk-mq-debugfs.c @@ -452,11 +452,11 @@ static void blk_mq_debugfs_tags_show(struct seq_file *m, atomic_read(&tags->active_queues)); seq_puts(m, "\nbitmap_tags:\n"); - sbitmap_queue_show(tags->bitmap_tags, m); + sbitmap_queue_show(&tags->bitmap_tags, m); if (tags->nr_reserved_tags) { seq_puts(m, "\nbreserved_tags:\n"); - sbitmap_queue_show(tags->breserved_tags, m); + sbitmap_queue_show(&tags->breserved_tags, m); } } @@ -487,7 +487,7 @@ static int hctx_tags_bitmap_show(void *data, struct seq_file *m) if (res) goto out; if (hctx->tags) - sbitmap_bitmap_show(&hctx->tags->bitmap_tags->sb, m); + sbitmap_bitmap_show(&hctx->tags->bitmap_tags.sb, m); mutex_unlock(&q->sysfs_lock); out: @@ -521,7 +521,7 @@ static int hctx_sched_tags_bitmap_show(void *data, struct seq_file *m) if (res) goto out; if (hctx->sched_tags) - sbitmap_bitmap_show(&hctx->sched_tags->bitmap_tags->sb, m); + sbitmap_bitmap_show(&hctx->sched_tags->bitmap_tags.sb, m); mutex_unlock(&q->sysfs_lock); out: diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index 4e71ce6b37ea..4cf0f74f4fa9 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c @@ -46,9 +46,9 @@ bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx) */ void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool include_reserve) { - sbitmap_queue_wake_all(tags->bitmap_tags); + sbitmap_queue_wake_all(&tags->bitmap_tags); if (include_reserve) - sbitmap_queue_wake_all(tags->breserved_tags); + sbitmap_queue_wake_all(&tags->breserved_tags); } /* @@ -104,10 +104,10 @@ unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data) WARN_ON_ONCE(1); return BLK_MQ_NO_TAG; } - bt = tags->breserved_tags; + bt = &tags->breserved_tags; tag_offset = 0; } else { - bt = tags->bitmap_tags; + bt = &tags->bitmap_tags; tag_offset = tags->nr_reserved_tags; } @@ -153,9 +153,9 @@ unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data) data->ctx); tags = blk_mq_tags_from_data(data); if (data->flags & BLK_MQ_REQ_RESERVED) - bt = tags->breserved_tags; + bt = &tags->breserved_tags; else - bt = tags->bitmap_tags; + bt = &tags->bitmap_tags; /* * If destination hw queue is changed, fake wake up on @@ -189,10 +189,10 @@ void blk_mq_put_tag(struct blk_mq_tags *tags, struct blk_mq_ctx *ctx, const int real_tag = tag - tags->nr_reserved_tags; BUG_ON(real_tag >= tags->nr_tags); - sbitmap_queue_clear(tags->bitmap_tags, real_tag, ctx->cpu); + sbitmap_queue_clear(&tags->bitmap_tags, real_tag, ctx->cpu); } else { BUG_ON(tag >= tags->nr_reserved_tags); - sbitmap_queue_clear(tags->breserved_tags, tag, ctx->cpu); + sbitmap_queue_clear(&tags->breserved_tags, tag, ctx->cpu); } } @@ -343,9 +343,9 @@ static void __blk_mq_all_tag_iter(struct blk_mq_tags *tags, WARN_ON_ONCE(flags & BT_TAG_ITER_RESERVED); if (tags->nr_reserved_tags) - bt_tags_for_each(tags, tags->breserved_tags, fn, priv, + bt_tags_for_each(tags, &tags->breserved_tags, fn, priv, flags | BT_TAG_ITER_RESERVED); - bt_tags_for_each(tags, tags->bitmap_tags, fn, priv, flags); + bt_tags_for_each(tags, &tags->bitmap_tags, fn, priv, flags); } /** @@ -462,8 +462,8 @@ void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn, continue; if (tags->nr_reserved_tags) - bt_for_each(hctx, tags->breserved_tags, fn, priv, true); - bt_for_each(hctx, tags->bitmap_tags, fn, priv, false); + bt_for_each(hctx, &tags->breserved_tags, fn, priv, true); + bt_for_each(hctx, &tags->bitmap_tags, fn, priv, false); } blk_queue_exit(q); } @@ -495,24 +495,6 @@ int blk_mq_init_bitmaps(struct sbitmap_queue *bitmap_tags, return -ENOMEM; } -static int blk_mq_init_bitmap_tags(struct blk_mq_tags *tags, - int node, int alloc_policy) -{ - int ret; - - ret = blk_mq_init_bitmaps(&tags->__bitmap_tags, - &tags->__breserved_tags, - tags->nr_tags, tags->nr_reserved_tags, - node, alloc_policy); - if (ret) - return ret; - - tags->bitmap_tags = &tags->__bitmap_tags; - tags->breserved_tags = &tags->__breserved_tags; - - return 0; -} - struct blk_mq_tags *blk_mq_init_tags(unsigned int total_tags, unsigned int reserved_tags, int node, int alloc_policy) @@ -532,7 +514,9 @@ struct blk_mq_tags *blk_mq_init_tags(unsigned int total_tags, tags->nr_reserved_tags = reserved_tags; spin_lock_init(&tags->lock); - if (blk_mq_init_bitmap_tags(tags, node, alloc_policy) < 0) { + if (blk_mq_init_bitmaps(&tags->bitmap_tags, &tags->breserved_tags, + total_tags, reserved_tags, node, + alloc_policy) < 0) { kfree(tags); return NULL; } @@ -541,8 +525,8 @@ struct blk_mq_tags *blk_mq_init_tags(unsigned int total_tags, void blk_mq_free_tags(struct blk_mq_tags *tags) { - sbitmap_queue_free(tags->bitmap_tags); - sbitmap_queue_free(tags->breserved_tags); + sbitmap_queue_free(&tags->bitmap_tags); + sbitmap_queue_free(&tags->breserved_tags); kfree(tags); } @@ -591,7 +575,7 @@ int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx, * Don't need (or can't) update reserved tags here, they * remain static and should never need resizing. */ - sbitmap_queue_resize(tags->bitmap_tags, + sbitmap_queue_resize(&tags->bitmap_tags, tdepth - tags->nr_reserved_tags); } @@ -602,12 +586,12 @@ void blk_mq_tag_resize_shared_sbitmap(struct blk_mq_tag_set *set, unsigned int s { struct blk_mq_tags *tags = set->shared_sbitmap_tags; - sbitmap_queue_resize(&tags->__bitmap_tags, size - set->reserved_tags); + sbitmap_queue_resize(&tags->bitmap_tags, size - set->reserved_tags); } void blk_mq_tag_update_sched_shared_sbitmap(struct request_queue *q) { - sbitmap_queue_resize(q->shared_sbitmap_tags->bitmap_tags, + sbitmap_queue_resize(&q->shared_sbitmap_tags->bitmap_tags, q->nr_requests - q->tag_set->reserved_tags); } diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h index e433e39a9cfa..23747ea2bb53 100644 --- a/block/blk-mq-tag.h +++ b/block/blk-mq-tag.h @@ -11,11 +11,8 @@ struct blk_mq_tags { atomic_t active_queues; - struct sbitmap_queue *bitmap_tags; - struct sbitmap_queue *breserved_tags; - - struct sbitmap_queue __bitmap_tags; - struct sbitmap_queue __breserved_tags; + struct sbitmap_queue bitmap_tags; + struct sbitmap_queue breserved_tags; struct request **rqs; struct request **static_rqs; diff --git a/block/blk-mq.c b/block/blk-mq.c index ece43855bcdf..5baa35cae8a0 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1062,14 +1062,14 @@ static inline unsigned int queued_to_index(unsigned int queued) static bool __blk_mq_get_driver_tag(struct request *rq) { - struct sbitmap_queue *bt = rq->mq_hctx->tags->bitmap_tags; + struct sbitmap_queue *bt = &rq->mq_hctx->tags->bitmap_tags; unsigned int tag_offset = rq->mq_hctx->tags->nr_reserved_tags; int tag; blk_mq_tag_busy(rq->mq_hctx); if (blk_mq_tag_is_reserved(rq->mq_hctx->sched_tags, rq->internal_tag)) { - bt = rq->mq_hctx->tags->breserved_tags; + bt = &rq->mq_hctx->tags->breserved_tags; tag_offset = 0; } else { if (!hctx_may_queue(rq->mq_hctx, bt)) @@ -1112,7 +1112,7 @@ static int blk_mq_dispatch_wake(wait_queue_entry_t *wait, unsigned mode, struct sbitmap_queue *sbq; list_del_init(&wait->entry); - sbq = hctx->tags->bitmap_tags; + sbq = &hctx->tags->bitmap_tags; atomic_dec(&sbq->ws_active); } spin_unlock(&hctx->dispatch_wait_lock); @@ -1130,7 +1130,7 @@ static int blk_mq_dispatch_wake(wait_queue_entry_t *wait, unsigned mode, static bool blk_mq_mark_tag_wait(struct blk_mq_hw_ctx *hctx, struct request *rq) { - struct sbitmap_queue *sbq = hctx->tags->bitmap_tags; + struct sbitmap_queue *sbq = &hctx->tags->bitmap_tags; struct wait_queue_head *wq; wait_queue_entry_t *wait; bool ret; diff --git a/block/kyber-iosched.c b/block/kyber-iosched.c index 15a8be57203d..9fb735bf1134 100644 --- a/block/kyber-iosched.c +++ b/block/kyber-iosched.c @@ -451,11 +451,11 @@ static void kyber_depth_updated(struct blk_mq_hw_ctx *hctx) { struct kyber_queue_data *kqd = hctx->queue->elevator->elevator_data; struct blk_mq_tags *tags = hctx->sched_tags; - unsigned int shift = tags->bitmap_tags->sb.shift; + unsigned int shift = tags->bitmap_tags.sb.shift; kqd->async_depth = (1U << shift) * KYBER_ASYNC_PERCENT / 100U; - sbitmap_queue_min_shallow_depth(tags->bitmap_tags, kqd->async_depth); + sbitmap_queue_min_shallow_depth(&tags->bitmap_tags, kqd->async_depth); } static int kyber_init_hctx(struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx) diff --git a/block/mq-deadline.c b/block/mq-deadline.c index 7f3c3932b723..7fd07d00838e 100644 --- a/block/mq-deadline.c +++ b/block/mq-deadline.c @@ -519,7 +519,7 @@ static void dd_depth_updated(struct blk_mq_hw_ctx *hctx) dd->async_depth = max(1UL, 3 * q->nr_requests / 4); - sbitmap_queue_min_shallow_depth(tags->bitmap_tags, dd->async_depth); + sbitmap_queue_min_shallow_depth(&tags->bitmap_tags, dd->async_depth); } /* Called by blk_mq_init_hctx() and blk_mq_init_sched(). */