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,URIBL_BLOCKED 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 B9536C43219 for ; Sun, 28 Apr 2019 08:14:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 917E42075D for ; Sun, 28 Apr 2019 08:14:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726650AbfD1IOp (ORCPT ); Sun, 28 Apr 2019 04:14:45 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41384 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726648AbfD1IOp (ORCPT ); Sun, 28 Apr 2019 04:14:45 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 37DE7356D3; Sun, 28 Apr 2019 08:14:45 +0000 (UTC) Received: from localhost (ovpn-8-32.pek2.redhat.com [10.72.8.32]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5103F6841F; Sun, 28 Apr 2019 08:14:41 +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" Subject: [PATCH V8 6/7] blk-mq: move cancel of hctx->run_work into blk_mq_hw_sysfs_release Date: Sun, 28 Apr 2019 16:14:07 +0800 Message-Id: <20190428081408.27331-7-ming.lei@redhat.com> In-Reply-To: <20190428081408.27331-1-ming.lei@redhat.com> References: <20190428081408.27331-1-ming.lei@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Sun, 28 Apr 2019 08:14:45 +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 , Reviewed-by: Bart Van Assche Reviewed-by: Hannes Reinecke Tested-by: James Smart 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 2dd94b3e9ece..f5b5f21ae4fd 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