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[68.160.176.52]) by smtp.gmail.com with ESMTPSA id d11sm1884722qki.40.2021.07.27.09.06.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Jul 2021 09:06:05 -0700 (PDT) Date: Tue, 27 Jul 2021 12:06:04 -0400 From: Mike Snitzer To: Christoph Hellwig Message-ID: References: <20210725055458.29008-1-hch@lst.de> <20210725055458.29008-5-hch@lst.de> MIME-Version: 1.0 In-Reply-To: <20210725055458.29008-5-hch@lst.de> X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 X-loop: dm-devel@redhat.com Cc: Jens Axboe , linux-block@vger.kernel.org, dm-devel@redhat.com Subject: Re: [dm-devel] [PATCH 4/8] block: support delayed holder registration 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 10.5.11.16 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 Sun, Jul 25 2021 at 1:54P -0400, Christoph Hellwig wrote: > device mapper needs to register holders before it is ready to do I/O. > Currently it does so by registering the disk early, which has all kinds > of bad side effects. Support registering holders on an initialized but > not registered disk instead by delaying the sysfs registration until the > disk is registered. This header starts to shine some light on what is motivating this series by touching on "all kinds of bad side effects" being fixed. Any chance you could elaborate what you've noticed/found/hit? Mike -- dm-devel mailing list dm-devel@redhat.com https://listman.redhat.com/mailman/listinfo/dm-devel