From patchwork Tue Nov 13 09:56:55 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "jianchao.wang" X-Patchwork-Id: 10680155 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6ADF514BA for ; Tue, 13 Nov 2018 09:57:54 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5153B2A2CD for ; Tue, 13 Nov 2018 09:57:54 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 456232A31D; Tue, 13 Nov 2018 09:57:54 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E407C2A2C7 for ; Tue, 13 Nov 2018 09:57:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731946AbeKMTzA (ORCPT ); Tue, 13 Nov 2018 14:55:00 -0500 Received: from userp2120.oracle.com ([156.151.31.85]:56350 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731901AbeKMTzA (ORCPT ); Tue, 13 Nov 2018 14:55:00 -0500 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.22/8.16.0.22) with SMTP id wAD9sEp4172092; Tue, 13 Nov 2018 09:57:38 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=corp-2018-07-02; bh=8r8OQMhYzZUlvXn+dSgCh4VfEI2yZFjtELYK27Lgzl8=; b=0PXmTeAfclotStpUykgTPmEGYvGc1ZTvUvnJI143HpNEov2wmKqFnKAhIW65sVForO9X Vl59PFWt2vX3yTWv3dl7HwSOdGtBRchaHzPK8dt4fU9isA+q/mZs5+N3wRwdbLDNmxt7 QTbo/pw3rPn0AJQbQjJM6FosBDClBO7biuXJlv9vytjtDEIPqBOgJ95dG5OBn0Anv7ps waLGSTtGny595qJJ/5ZikesXRV6dnZ6McgbjP/kIjRQIgm6mAFGd+foG/tlIbhbbDOvC w++Dk0oIVy8QORXEG169D9k7S6H5VdXV6UFip6LRrwPZjsK72pznvpKXdH4WOkUzeEYG qA== Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by userp2120.oracle.com with ESMTP id 2nnwc0hgxs-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 13 Nov 2018 09:57:37 +0000 Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by userv0022.oracle.com (8.14.4/8.14.4) with ESMTP id wAD9vbVk023778 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 13 Nov 2018 09:57:37 GMT Received: from abhmp0020.oracle.com (abhmp0020.oracle.com [141.146.116.26]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id wAD9va8n025588; Tue, 13 Nov 2018 09:57:37 GMT Received: from will-ThinkCentre-M93p.cn.oracle.com (/10.182.70.234) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 13 Nov 2018 01:57:36 -0800 From: Jianchao Wang To: axboe@kernel.dk Cc: ming.lei@redhat.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH V6 4/5] blk-mq: issue directly with bypass 'false' in blk_mq_sched_insert_requests Date: Tue, 13 Nov 2018 17:56:55 +0800 Message-Id: <1542103016-21037-5-git-send-email-jianchao.w.wang@oracle.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1542103016-21037-1-git-send-email-jianchao.w.wang@oracle.com> References: <1542103016-21037-1-git-send-email-jianchao.w.wang@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9075 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1811130093 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP It is not necessary to issue request directly with bypass 'true' in blk_mq_sched_insert_requests and handle the non-issued requests itself. Just set bypass to 'false' and let blk_mq_try_issue_directly handle them totally. Signed-off-by: Jianchao Wang --- block/blk-mq-sched.c | 8 +++----- block/blk-mq.c | 13 +++---------- 2 files changed, 6 insertions(+), 15 deletions(-) diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c index 66fda19..9af57c8 100644 --- a/block/blk-mq-sched.c +++ b/block/blk-mq-sched.c @@ -410,12 +410,10 @@ void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx, * busy in case of 'none' scheduler, and this way may save * us one extra enqueue & dequeue to sw queue. */ - if (!hctx->dispatch_busy && !e && !run_queue_async) { + if (!hctx->dispatch_busy && !e && !run_queue_async) blk_mq_try_issue_list_directly(hctx, list); - if (list_empty(list)) - return; - } - blk_mq_insert_requests(hctx, ctx, list); + else + blk_mq_insert_requests(hctx, ctx, list); } blk_mq_run_hw_queue(hctx, run_queue_async); diff --git a/block/blk-mq.c b/block/blk-mq.c index 58f15cc..f41a815 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1855,21 +1855,14 @@ blk_status_t blk_mq_request_issue_directly(struct request *rq) void blk_mq_try_issue_list_directly(struct blk_mq_hw_ctx *hctx, struct list_head *list) { + blk_qc_t unused_cookie; + while (!list_empty(list)) { - blk_status_t ret; struct request *rq = list_first_entry(list, struct request, queuelist); list_del_init(&rq->queuelist); - ret = blk_mq_request_issue_directly(rq); - if (ret != BLK_STS_OK) { - if (ret == BLK_STS_RESOURCE || - ret == BLK_STS_DEV_RESOURCE) { - list_add(&rq->queuelist, list); - break; - } - blk_mq_end_request(rq, ret); - } + blk_mq_try_issue_directly(hctx, rq, &unused_cookie, false); } }