From patchwork Tue Jun 11 05:19:16 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13693130 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BD3DDC27C65 for ; Tue, 11 Jun 2024 05:28:03 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.737720.1144217 (Exim 4.92) (envelope-from ) id 1sGu31-0001t8-RP; Tue, 11 Jun 2024 05:27:55 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 737720.1144217; Tue, 11 Jun 2024 05:27:55 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1sGu31-0001rf-Nr; Tue, 11 Jun 2024 05:27:55 +0000 Received: by outflank-mailman (input) for mailman id 737720; Tue, 11 Jun 2024 05:27:53 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1sGtw3-0006gk-87 for xen-devel@lists.xenproject.org; Tue, 11 Jun 2024 05:20:43 +0000 Received: from bombadil.infradead.org (bombadil.infradead.org [2607:7c80:54:3::133]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 5536dac9-27b2-11ef-b4bb-af5377834399; Tue, 11 Jun 2024 07:20:37 +0200 (CEST) Received: from 2a02-8389-2341-5b80-cdb4-8e7d-405d-6b77.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:cdb4:8e7d:405d:6b77] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.97.1 #2 (Red Hat Linux)) id 1sGtvf-00000007RHo-0EdF; Tue, 11 Jun 2024 05:20:20 +0000 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 5536dac9-27b2-11ef-b4bb-af5377834399 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=JbMVJ/FXRp2fRg+LG74XYlDu5LD/z/A0OThY3vyxvEY=; b=U+OCOYuQKA7+zHZ8rI+/LEGIbf yyzT81mUDdX1g1y0nBhYq/a+EznJGskITZ623q2rthgZDGhP42yUIKsgXE0ezCNhyosXm+RT9FFEY A52iyPdbnDIJ5efpmZnKHUpUenY083jIVDC+WPBVWwVEAvPeAn6CciLM4N1Hcpehk9s3Mp9orQCQx 68Ico/AWJ9UgH34ohFg3R2d02LxxNNUJwlskWjJLiWi8hQSJdujL9ZerI2qqS9YzvjknwcVoZeFU1 +DCgonENDPhmpHZVeWByIfwrHG/4RyEwbq1nEHWLdTax+87Gv1zqzs9FGYPjA3r3/RjI/XKpixsP7 sylNMw8A==; From: Christoph Hellwig To: Jens Axboe Cc: Geert Uytterhoeven , Richard Weinberger , Philipp Reisner , Lars Ellenberg , =?utf-8?q?Christoph_B=C3=B6hmwa?= =?utf-8?q?lder?= , Josef Bacik , Ming Lei , "Michael S. Tsirkin" , Jason Wang , =?utf-8?q?Roger_Pau_Monn=C3=A9?= , Alasdair Kergon , Mike Snitzer , Mikulas Patocka , Song Liu , Yu Kuai , Vineeth Vijayan , "Martin K. Petersen" , linux-m68k@lists.linux-m68k.org, linux-um@lists.infradead.org, drbd-dev@lists.linbit.com, nbd@other.debian.org, linuxppc-dev@lists.ozlabs.org, ceph-devel@vger.kernel.org, virtualization@lists.linux.dev, xen-devel@lists.xenproject.org, linux-bcache@vger.kernel.org, dm-devel@lists.linux.dev, linux-raid@vger.kernel.org, linux-mmc@vger.kernel.org, linux-mtd@lists.infradead.org, nvdimm@lists.linux.dev, linux-nvme@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-block@vger.kernel.org Subject: [PATCH 16/26] block: move the io_stat flag setting to queue_limits Date: Tue, 11 Jun 2024 07:19:16 +0200 Message-ID: <20240611051929.513387-17-hch@lst.de> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240611051929.513387-1-hch@lst.de> References: <20240611051929.513387-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Move the io_stat flag into the queue_limits feature field so that it can be set atomically and all I/O is frozen when changing the flag. Simplify md and dm to set the flag unconditionally instead of avoiding setting a simple flag for cases where it already is set by other means, which is a bit pointless. Signed-off-by: Christoph Hellwig --- block/blk-mq-debugfs.c | 1 - block/blk-mq.c | 6 +++++- block/blk-sysfs.c | 2 +- drivers/md/dm-table.c | 12 +++++++++--- drivers/md/dm.c | 13 +++---------- drivers/md/md.c | 5 ++--- drivers/nvme/host/multipath.c | 2 +- include/linux/blkdev.h | 9 +++++---- 8 files changed, 26 insertions(+), 24 deletions(-) diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c index 6b7edb50bfd3fa..cbe99444ed1a54 100644 --- a/block/blk-mq-debugfs.c +++ b/block/blk-mq-debugfs.c @@ -84,7 +84,6 @@ static const char *const blk_queue_flag_name[] = { QUEUE_FLAG_NAME(NOMERGES), QUEUE_FLAG_NAME(SAME_COMP), QUEUE_FLAG_NAME(FAIL_IO), - QUEUE_FLAG_NAME(IO_STAT), QUEUE_FLAG_NAME(NOXMERGES), QUEUE_FLAG_NAME(SYNCHRONOUS), QUEUE_FLAG_NAME(SAME_FORCE), diff --git a/block/blk-mq.c b/block/blk-mq.c index 58b0d6c7cc34d6..cf67dc13f7dd4c 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -4116,7 +4116,11 @@ struct request_queue *blk_mq_alloc_queue(struct blk_mq_tag_set *set, struct request_queue *q; int ret; - q = blk_alloc_queue(lim ? lim : &default_lim, set->numa_node); + if (!lim) + lim = &default_lim; + lim->features |= BLK_FEAT_IO_STAT; + + q = blk_alloc_queue(lim, set->numa_node); if (IS_ERR(q)) return q; q->queuedata = queuedata; diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 9174aca3b85526..6f58530fb3c08e 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -324,7 +324,7 @@ queue_##name##_store(struct request_queue *q, const char *page, size_t count) \ QUEUE_SYSFS_FEATURE(rotational, BLK_FEAT_ROTATIONAL) QUEUE_SYSFS_FEATURE(add_random, BLK_FEAT_ADD_RANDOM) -QUEUE_SYSFS_BIT_FNS(iostats, IO_STAT, 0); +QUEUE_SYSFS_FEATURE(iostats, BLK_FEAT_IO_STAT) QUEUE_SYSFS_BIT_FNS(stable_writes, STABLE_WRITES, 0); #undef QUEUE_SYSFS_BIT_FNS diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 7654babc2775c1..3e3b713502f61e 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -579,6 +579,12 @@ int dm_split_args(int *argc, char ***argvp, char *input) return 0; } +static void dm_set_stacking_limits(struct queue_limits *limits) +{ + blk_set_stacking_limits(limits); + limits->features |= BLK_FEAT_IO_STAT; +} + /* * Impose necessary and sufficient conditions on a devices's table such * that any incoming bio which respects its logical_block_size can be @@ -617,7 +623,7 @@ static int validate_hardware_logical_block_alignment(struct dm_table *t, for (i = 0; i < t->num_targets; i++) { ti = dm_table_get_target(t, i); - blk_set_stacking_limits(&ti_limits); + dm_set_stacking_limits(&ti_limits); /* combine all target devices' limits */ if (ti->type->iterate_devices) @@ -1591,7 +1597,7 @@ int dm_calculate_queue_limits(struct dm_table *t, unsigned int zone_sectors = 0; bool zoned = false; - blk_set_stacking_limits(limits); + dm_set_stacking_limits(limits); t->integrity_supported = true; for (unsigned int i = 0; i < t->num_targets; i++) { @@ -1604,7 +1610,7 @@ int dm_calculate_queue_limits(struct dm_table *t, for (unsigned int i = 0; i < t->num_targets; i++) { struct dm_target *ti = dm_table_get_target(t, i); - blk_set_stacking_limits(&ti_limits); + dm_set_stacking_limits(&ti_limits); if (!ti->type->iterate_devices) { /* Set I/O hints portion of queue limits */ diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 13037d6a6f62a2..8a976cee448bed 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -2386,22 +2386,15 @@ int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t) struct table_device *td; int r; - switch (type) { - case DM_TYPE_REQUEST_BASED: + WARN_ON_ONCE(type == DM_TYPE_NONE); + + if (type == DM_TYPE_REQUEST_BASED) { md->disk->fops = &dm_rq_blk_dops; r = dm_mq_init_request_queue(md, t); if (r) { DMERR("Cannot initialize queue for request-based dm mapped device"); return r; } - break; - case DM_TYPE_BIO_BASED: - case DM_TYPE_DAX_BIO_BASED: - blk_queue_flag_set(QUEUE_FLAG_IO_STAT, md->queue); - break; - case DM_TYPE_NONE: - WARN_ON_ONCE(true); - break; } r = dm_calculate_queue_limits(t, &limits); diff --git a/drivers/md/md.c b/drivers/md/md.c index c23423c51fb7c2..8db0db8d5a27ac 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -5787,7 +5787,8 @@ struct mddev *md_alloc(dev_t dev, char *name) int unit; int error; struct queue_limits lim = { - .features = BLK_FEAT_WRITE_CACHE | BLK_FEAT_FUA, + .features = BLK_FEAT_WRITE_CACHE | BLK_FEAT_FUA | + BLK_FEAT_IO_STAT, }; /* @@ -6152,8 +6153,6 @@ int md_run(struct mddev *mddev) if (!mddev_is_dm(mddev)) { struct request_queue *q = mddev->gendisk->queue; - blk_queue_flag_set(QUEUE_FLAG_IO_STAT, q); - /* Set the NOWAIT flags if all underlying devices support it */ if (nowait) blk_queue_flag_set(QUEUE_FLAG_NOWAIT, q); diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index 58c13304e558e0..eea727cfa9e67d 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -538,6 +538,7 @@ int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, struct nvme_ns_head *head) blk_set_stacking_limits(&lim); lim.dma_alignment = 3; + lim.features |= BLK_FEAT_IO_STAT; if (head->ids.csi != NVME_CSI_ZNS) lim.max_zone_append_sectors = 0; @@ -550,7 +551,6 @@ int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, struct nvme_ns_head *head) ctrl->subsys->instance, head->instance); blk_queue_flag_set(QUEUE_FLAG_NOWAIT, head->disk->queue); - blk_queue_flag_set(QUEUE_FLAG_IO_STAT, head->disk->queue); /* * This assumes all controllers that refer to a namespace either * support poll queues or not. That is not a strict guarantee, diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index e6a2382e21c4fe..f8e38f94fd8c9a 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -295,6 +295,9 @@ enum { /* contributes to the random number pool */ BLK_FEAT_ADD_RANDOM = (1u << 3), + + /* do disk/partitions IO accounting */ + BLK_FEAT_IO_STAT = (1u << 4), }; /* @@ -558,7 +561,6 @@ struct request_queue { #define QUEUE_FLAG_NOMERGES 3 /* disable merge attempts */ #define QUEUE_FLAG_SAME_COMP 4 /* complete on same CPU-group */ #define QUEUE_FLAG_FAIL_IO 5 /* fake timeout */ -#define QUEUE_FLAG_IO_STAT 7 /* do disk/partitions IO accounting */ #define QUEUE_FLAG_NOXMERGES 9 /* No extended merges */ #define QUEUE_FLAG_SYNCHRONOUS 11 /* always completes in submit context */ #define QUEUE_FLAG_SAME_FORCE 12 /* force complete on same CPU */ @@ -577,8 +579,7 @@ struct request_queue { #define QUEUE_FLAG_SQ_SCHED 30 /* single queue style io dispatch */ #define QUEUE_FLAG_SKIP_TAGSET_QUIESCE 31 /* quiesce_tagset skip the queue*/ -#define QUEUE_FLAG_MQ_DEFAULT ((1UL << QUEUE_FLAG_IO_STAT) | \ - (1UL << QUEUE_FLAG_SAME_COMP) | \ +#define QUEUE_FLAG_MQ_DEFAULT ((1UL << QUEUE_FLAG_SAME_COMP) | \ (1UL << QUEUE_FLAG_NOWAIT)) void blk_queue_flag_set(unsigned int flag, struct request_queue *q); @@ -592,7 +593,7 @@ bool blk_queue_flag_test_and_set(unsigned int flag, struct request_queue *q); #define blk_queue_noxmerges(q) \ test_bit(QUEUE_FLAG_NOXMERGES, &(q)->queue_flags) #define blk_queue_nonrot(q) ((q)->limits.features & BLK_FEAT_ROTATIONAL) -#define blk_queue_io_stat(q) test_bit(QUEUE_FLAG_IO_STAT, &(q)->queue_flags) +#define blk_queue_io_stat(q) ((q)->limits.features & BLK_FEAT_IO_STAT) #define blk_queue_zone_resetall(q) \ test_bit(QUEUE_FLAG_ZONE_RESETALL, &(q)->queue_flags) #define blk_queue_dax(q) test_bit(QUEUE_FLAG_DAX, &(q)->queue_flags)