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[73.241.217.19]) by smtp.gmail.com with ESMTPSA id i22sm5921657pgj.90.2021.04.01.09.09.53 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 01 Apr 2021 09:09:54 -0700 (PDT) Subject: Re: Recursive locking complaint with nvme-5.13 branch To: Christoph Hellwig Cc: "linux-nvme@lists.infradead.org" References: <20210401153722.GA1501960@infradead.org> From: Bart Van Assche Message-ID: <2d76014e-1e78-0ea9-e661-e441334f7897@acm.org> Date: Thu, 1 Apr 2021 09:09:53 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.0 MIME-Version: 1.0 In-Reply-To: <20210401153722.GA1501960@infradead.org> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210401_170957_711392_01F7C3E2 X-CRM114-Status: GOOD ( 17.24 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On 4/1/21 8:37 AM, Christoph Hellwig wrote: > On Wed, Mar 31, 2021 at 09:03:36PM -0700, Bart Van Assche wrote: >> If I boot a VM with the nvme-5.13 branch (commit 24e238c92186 >> ("nvme: warn of unhandled effects only once")) then the complaint >> shown below is reported. Is this a known issue? > > This looks like someone is trying to open a nvme device as the backing > device for pktcdvd? In that case this is a different bd_mutex. But > I'm really curious why systemd would do that. Hi Christoph, This call trace was reported during boot. The configuration of the VM that reported this call trace is as follows: - Boot from a virtio disk. - One SATA CD-ROM. - One SATA disk. - One IDE disk. - One SCSI disk. - No NVMe controller since virt-manager does not support NVMe controllers as far as I know. I reported this call trace to the linux-nvme mailing list instead of linux-block since I haven't seen this call trace yet with Jens' for-next branch. Please let me know if you need more information. Bart. _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme