From patchwork Tue Dec 21 14:14:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ming Lei X-Patchwork-Id: 12689677 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 us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 98007C433EF for ; Tue, 21 Dec 2021 14:15:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1640096149; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding:list-id:list-help: list-unsubscribe:list-subscribe:list-post; bh=JS/fWS6zpZHhThhXgENcEVotSuPmYZWUWnT7vwxq8iI=; b=B4jHeIP4hRnDl401O/6OywSWC4v88eSdtW4deGZ/id+JhtA6T2I5RFIrspepj33tsYu8xV 6mwiaEG7FhWDc3T6rVvZTOsp5K6qgOaOQ7jlGXebbm0Nfp4H+DTA3O5sUiQgb7RxJv77xA rtd7XhrK6Os9cud0J5s4nEWzEMba5r4= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-520-b4LeMklnPoOthEnYG-Ipog-1; Tue, 21 Dec 2021 09:15:46 -0500 X-MC-Unique: b4LeMklnPoOthEnYG-Ipog-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 5D524801962; Tue, 21 Dec 2021 14:15:41 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by smtp.corp.redhat.com (Postfix) with ESMTPS id CBA89908B; Tue, 21 Dec 2021 14:15:39 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id 2B5694BB7C; Tue, 21 Dec 2021 14:15:37 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 1BLEFZXp006161 for ; Tue, 21 Dec 2021 09:15:35 -0500 Received: by smtp.corp.redhat.com (Postfix) id C06E04BC67; Tue, 21 Dec 2021 14:15:35 +0000 (UTC) Received: from localhost (ovpn-8-30.pek2.redhat.com [10.72.8.30]) by smtp.corp.redhat.com (Postfix) with ESMTP id 501A94BC6F; Tue, 21 Dec 2021 14:15:04 +0000 (UTC) From: Ming Lei To: Jens Axboe , Mike Snitzer Date: Tue, 21 Dec 2021 22:14:56 +0800 Message-Id: <20211221141459.1368176-1-ming.lei@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-loop: dm-devel@redhat.com Cc: linux-block@vger.kernel.org, dm-devel@redhat.com, Ming Lei Subject: [dm-devel] [PATCH 0/3] blk-mq/dm-rq: support BLK_MQ_F_BLOCKING for dm-rq X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Hello, dm-rq may be built on blk-mq device which marks BLK_MQ_F_BLOCKING, so dm_mq_queue_rq() may become to sleep current context. Fixes the issue by allowing dm-rq to set BLK_MQ_F_BLOCKING in case that any underlying queue is marked as BLK_MQ_F_BLOCKING. DM request queue is allocated before allocating tagset, this way is a bit special, so we need to pre-allocate srcu payload, then use the queue flag of QUEUE_FLAG_BLOCKING for locking dispatch. Ming Lei (3): block: split having srcu from queue blocking block: add blk_alloc_disk_srcu dm: mark dm queue as blocking if any underlying is blocking block/blk-core.c | 2 +- block/blk-mq.c | 6 +++--- block/blk-mq.h | 2 +- block/blk-sysfs.c | 2 +- block/genhd.c | 5 +++-- drivers/md/dm-rq.c | 5 ++++- drivers/md/dm-rq.h | 3 ++- drivers/md/dm-table.c | 14 ++++++++++++++ drivers/md/dm.c | 5 +++-- drivers/md/dm.h | 1 + include/linux/blkdev.h | 5 +++-- include/linux/genhd.h | 12 ++++++++---- 12 files changed, 44 insertions(+), 18 deletions(-)