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Wed, 03 Mar 2021 03:39:41 +0000 Received: from DGGEMM401-HUB.china.huawei.com (unknown [172.30.72.53]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4Dr07g1mDnzYFSX; Wed, 3 Mar 2021 11:37:51 +0800 (CST) Received: from dggema772-chm.china.huawei.com (10.1.198.214) by DGGEMM401-HUB.china.huawei.com (10.3.20.209) with Microsoft SMTP Server (TLS) id 14.3.498.0; Wed, 3 Mar 2021 11:39:12 +0800 Received: from [10.169.42.93] (10.169.42.93) by dggema772-chm.china.huawei.com (10.1.198.214) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2106.2; Wed, 3 Mar 2021 11:39:11 +0800 Subject: Re: [PATCH] nvme-rdma: fix crash for no IO queues To: Keith Busch CC: Hannes Reinecke , References: <20210223072602.3196-1-lengchao@huawei.com> <20210223232137.GA23682@redsun51.ssa.fujisawa.hgst.com> <7c30ddb7-ee41-9972-4cb6-0a5c089f687c@huawei.com> <2a9bb7c3-eb4e-2341-dcfa-583d41912977@suse.de> <0a8fbff4-3759-f300-1fa8-601df1eab683@huawei.com> <8ceff1a9-8015-feab-6c02-fd22ec3346de@huawei.com> <20210302182418.GA22346@redsun51.ssa.fujisawa.hgst.com> <399fd796-64c2-7d25-b0d8-0f445c4bb2dd@huawei.com> <20210303031416.GD22346@redsun51.ssa.fujisawa.hgst.com> From: Chao Leng Message-ID: <1fc0b92d-0726-9309-42ce-3e64858cd3aa@huawei.com> Date: Wed, 3 Mar 2021 11:39:11 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: <20210303031416.GD22346@redsun51.ssa.fujisawa.hgst.com> Content-Language: en-US X-Originating-IP: [10.169.42.93] X-ClientProxiedBy: dggeme712-chm.china.huawei.com (10.1.199.108) To dggema772-chm.china.huawei.com (10.1.198.214) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210303_033941_730064_3F38DC73 X-CRM114-Status: UNSURE ( 9.53 ) X-CRM114-Notice: Please train this message. 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 2021/3/3 11:14, Keith Busch wrote: > On Wed, Mar 03, 2021 at 10:27:01AM +0800, Chao Leng wrote: >> On 2021/3/3 2:24, Keith Busch wrote: >>> We can continue to administrate a controller that didn't create IO >>> queues, but the controller must provide a response to all commands. If >>> it doesn't, the controller will either be reset or abandoned. This >>> should be the same behavior for any transport, though; there's nothing >>> special about PCIe for that. >> Though I don't see any useful scenarios for nvme over fabric now, >> Reserved for future possibilities may be a better choice. > > The admin queue may be the only way for a user to retrieve useful > information on the malfunctioning controller. The telemetry log isn't > unique to PCIe. User can also directly visit target to get these information for nvme over fabrics. > . > _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme