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=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS 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 D3EE3C4360F for ; Wed, 3 Apr 2019 10:26:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ABD6520882 for ; Wed, 3 Apr 2019 10:26:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726515AbfDCK0h (ORCPT ); Wed, 3 Apr 2019 06:26:37 -0400 Received: from mx1.redhat.com ([209.132.183.28]:53062 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726442AbfDCK0h (ORCPT ); Wed, 3 Apr 2019 06:26:37 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 403EE3091761; Wed, 3 Apr 2019 10:26:37 +0000 (UTC) Received: from localhost (ovpn-8-25.pek2.redhat.com [10.72.8.25]) by smtp.corp.redhat.com (Postfix) with ESMTP id EDB37608BA; Wed, 3 Apr 2019 10:26:32 +0000 (UTC) From: Ming Lei To: Jens Axboe Cc: linux-block@vger.kernel.org, Ming Lei , Dongli Zhang , James Smart , Bart Van Assche , linux-scsi@vger.kernel.org, "Martin K . Petersen" , Christoph Hellwig , "James E . J . Bottomley" , jianchao wang Subject: [PATCH V3 4/6] blk-mq: move cancel of hctx->run_work into blk_mq_hw_sysfs_release Date: Wed, 3 Apr 2019 18:26:07 +0800 Message-Id: <20190403102609.18707-5-ming.lei@redhat.com> In-Reply-To: <20190403102609.18707-1-ming.lei@redhat.com> References: <20190403102609.18707-1-ming.lei@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.41]); Wed, 03 Apr 2019 10:26:37 +0000 (UTC) Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org hctx is always released after requeue is freed. With holding queue's kobject refcount, it is safe for driver to run queue, so one run queue might be scheduled after blk_sync_queue() is done. So moving the cancel of hctx->run_work into blk_mq_hw_sysfs_release() for avoiding run released queue. Cc: Dongli Zhang Cc: James Smart Cc: Bart Van Assche Cc: linux-scsi@vger.kernel.org, Cc: Martin K . Petersen , Cc: Christoph Hellwig , Cc: James E . J . Bottomley , Cc: jianchao wang Signed-off-by: Ming Lei --- block/blk-core.c | 8 -------- block/blk-mq-sysfs.c | 2 ++ 2 files changed, 2 insertions(+), 8 deletions(-) diff --git a/block/blk-core.c b/block/blk-core.c index 20298aa5a77c..ad17e999f79e 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -232,14 +232,6 @@ void blk_sync_queue(struct request_queue *q) { del_timer_sync(&q->timeout); cancel_work_sync(&q->timeout_work); - - if (queue_is_mq(q)) { - struct blk_mq_hw_ctx *hctx; - int i; - - queue_for_each_hw_ctx(q, hctx, i) - cancel_delayed_work_sync(&hctx->run_work); - } } EXPORT_SYMBOL(blk_sync_queue); diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c index 4040e62c3737..25c0d0a6a556 100644 --- a/block/blk-mq-sysfs.c +++ b/block/blk-mq-sysfs.c @@ -35,6 +35,8 @@ static void blk_mq_hw_sysfs_release(struct kobject *kobj) struct blk_mq_hw_ctx *hctx = container_of(kobj, struct blk_mq_hw_ctx, kobj); + cancel_delayed_work_sync(&hctx->run_work); + if (hctx->flags & BLK_MQ_F_BLOCKING) cleanup_srcu_struct(hctx->srcu); blk_free_flush_queue(hctx->fq); -- 2.9.5