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spf=tempfail smtp.mailfrom=dm-devel-bounces@redhat.com Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-412-QTs9ZKYiNki_eFFcqF9b6Q-1; Fri, 21 May 2021 02:23:21 -0400 X-MC-Unique: QTs9ZKYiNki_eFFcqF9b6Q-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id EFE25801B12; Fri, 21 May 2021 06:23:17 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.20]) by smtp.corp.redhat.com (Postfix) with ESMTPS id D98C95D9CC; Fri, 21 May 2021 06:23:16 +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 5C9971800BB8; Fri, 21 May 2021 06:23:14 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 14L6NBno029718 for ; Fri, 21 May 2021 02:23:12 -0400 Received: by smtp.corp.redhat.com (Postfix) id CA731117DB17; Fri, 21 May 2021 06:23:11 +0000 (UTC) Received: from mimecast-mx02.redhat.com (mimecast04.extmail.prod.ext.rdu2.redhat.com [10.11.55.20]) by smtp.corp.redhat.com (Postfix) with ESMTPS id C48E2117DB15 for ; Fri, 21 May 2021 06:23:08 +0000 (UTC) Received: from us-smtp-1.mimecast.com (us-smtp-1.mimecast.com [205.139.110.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id C14B5101A531 for ; Fri, 21 May 2021 06:23:08 +0000 (UTC) Received: from verein.lst.de (verein.lst.de [213.95.11.211]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-380-luYGe6lxPgSBck6BHQ_Hkg-1; Fri, 21 May 2021 02:23:06 -0400 X-MC-Unique: luYGe6lxPgSBck6BHQ_Hkg-1 Received: by verein.lst.de (Postfix, from userid 2407) id C508C6736F; Fri, 21 May 2021 08:23:01 +0200 (CEST) Date: Fri, 21 May 2021 08:23:01 +0200 From: Christoph Hellwig To: Coly Li Message-ID: <20210521062301.GA10244@lst.de> References: <20210521055116.1053587-1-hch@lst.de> <20210521055116.1053587-13-hch@lst.de> MIME-Version: 1.0 In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-loop: dm-devel@redhat.com Cc: nvdimm@lists.linux.dev, linux-m68k@vger.kernel.org, Mike Snitzer , Ulf Hansson , linux-nvme@lists.infradead.org, Max Filippov , dm-devel@redhat.com, Joshua Morris , linux-s390@vger.kernel.org, Dave Jiang , Maxim Levitsky , Vishal Verma , Christoph Hellwig , Christian Borntraeger , Geert Uytterhoeven , Matias Bjorling , Nitin Gupta , Vasily Gorbik , linux-xtensa@linux-xtensa.org, Alex Dubov , Heiko Carstens , linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, linux-block@vger.kernel.org, drbd-dev@tron.linbit.com, Philip Kelleher , Dan Williams , Jens Axboe , Chris Zankel , Song Liu , linux-mmc@vger.kernel.org, Philipp Reisner , Jim Paris , Minchan Kim , Lars Ellenberg , linuxppc-dev@lists.ozlabs.org Subject: Re: [dm-devel] [PATCH 12/26] bcache: convert to blk_alloc_disk/blk_cleanup_disk 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 2.79 on 10.5.11.14 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 Content-Disposition: inline Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit On Fri, May 21, 2021 at 02:15:32PM +0800, Coly Li wrote: > The above 2 lines are added on purpose to prevent an refcount > underflow. It is from commit 86da9f736740 ("bcache: fix refcount > underflow in bcache_device_free()"). > > Maybe add a parameter to blk_cleanup_disk() or checking (disk->flags & > GENHD_FL_UP) inside blk_cleanup_disk() ? Please take a look at patch 4 in the series. -- dm-devel mailing list dm-devel@redhat.com https://listman.redhat.com/mailman/listinfo/dm-devel