From mboxrd@z Thu Jan 1 00:00:00 1970 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=-8.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,UNPARSEABLE_RELAY,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 72878ECDE32 for ; Wed, 17 Oct 2018 09:05:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 38ABA2152A for ; Wed, 17 Oct 2018 09:05:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="Bq8xb5u3" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 38ABA2152A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=oracle.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727196AbeJQQ74 (ORCPT ); Wed, 17 Oct 2018 12:59:56 -0400 Received: from userp2130.oracle.com ([156.151.31.86]:47978 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726904AbeJQQ7z (ORCPT ); Wed, 17 Oct 2018 12:59:55 -0400 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w9H8x6dH114878; Wed, 17 Oct 2018 09:05:06 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=khVFuOwx5RaV2RTaA9/8d01Q+bnD4cjbDGh7bO2VOu8=; b=Bq8xb5u3Cvs07EzBKW/IbsgJE2C9L5+QW3dQVeYnys8UuCT8iDxf/Shp22rzU2RP9fRv uP1Ymy6VcLbd0Y17jiB28z89EoSG/CezN/jejdaab3hXGC3AjBObIuVQ6dR46FhnpmNC 3053HimAws3XOIxjubJvhIffrk2CHEqdhHbkU+sSNa3I1HmSEBQmhqvx0p9gjHTkMzky t4yuR+Jk0ykdOc3O3C7LpYRgmiqHCU+4CmsAmuVzx06RvW0kiy1KnpMtCsJDVOjzcOdH jKh+jlyRQfp9MtIR4iT5uFpvCmkEBYZkN0nv1ugG/9ticJSOO/76Eidbk1Bp2/7cn2Cm HQ== Received: from aserv0022.oracle.com (aserv0022.oracle.com [141.146.126.234]) by userp2130.oracle.com with ESMTP id 2n384u5tjc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 17 Oct 2018 09:05:06 +0000 Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by aserv0022.oracle.com (8.14.4/8.14.4) with ESMTP id w9H954gK009269 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 17 Oct 2018 09:05:05 GMT Received: from abhmp0008.oracle.com (abhmp0008.oracle.com [141.146.116.14]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id w9H95362024765; Wed, 17 Oct 2018 09:05:04 GMT Received: from will-ThinkCentre-M910s.cn.oracle.com (/10.182.70.254) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 17 Oct 2018 02:05:03 -0700 From: Jianchao Wang To: axboe@kernel.dk Cc: hch@lst.de, keith.busch@linux.intel.com, ming.lei@redhat.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH V2 2/3] blk-mq: retrieve bios before update nr_hw_queues Date: Wed, 17 Oct 2018 17:07:11 +0800 Message-Id: <1539767232-9389-3-git-send-email-jianchao.w.wang@oracle.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1539767232-9389-1-git-send-email-jianchao.w.wang@oracle.com> References: <1539767232-9389-1-git-send-email-jianchao.w.wang@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9048 signatures=668706 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=807 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1810170082 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org retrieve bios of all requests on queue to drain requests, then needn't depend on storage device to drain the queue any more. Signed-off-by: Jianchao Wang --- block/blk-mq.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index f75598b..6d89d3e 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -3085,7 +3085,10 @@ static void __blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, return; list_for_each_entry(q, &set->tag_list, tag_set_list) - blk_mq_freeze_queue(q); + blk_freeze_queue_start(q); + + list_for_each_entry(q, &set->tag_list, tag_set_list) + blk_mq_sched_retrieve_bios(q); /* * Sync with blk_mq_queue_tag_busy_iter. */ -- 2.7.4