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[73.241.217.19]) by smtp.gmail.com with ESMTPSA id n5sm6331272pfq.44.2021.03.19.11.32.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 19 Mar 2021 11:32:26 -0700 (PDT) Subject: Re: [RFC PATCH v3 2/3] blk-mq: Freeze and quiesce all queues for tagset in elevator_exit() To: John Garry , Ming Lei Cc: "hare@suse.de" , "axboe@kernel.dk" , "hch@lst.de" , "linux-block@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "pragalla@codeaurora.org" , "kashyap.desai@broadcom.com" , yuyufen References: <1614957294-188540-1-git-send-email-john.garry@huawei.com> <1614957294-188540-3-git-send-email-john.garry@huawei.com> <8c6c6783-6152-2332-2f50-14c409e40320@huawei.com> <2b0c66ba-03b3-844c-1684-f8e80d11cdbb@acm.org> <4ffaba53-100a-43a5-8746-b753d4153be5@huawei.com> <82526e78-66e5-fc3c-7acd-38f1813ebe1e@huawei.com> <85fd2c95-2258-9b51-02f8-01895c06f814@huawei.com> From: Bart Van Assche Message-ID: <4bd89a91-ca98-9c22-e01b-9fb7936623cd@acm.org> Date: Fri, 19 Mar 2021 11:32:25 -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: <85fd2c95-2258-9b51-02f8-01895c06f814@huawei.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/19/21 11:19 AM, John Garry wrote: > OK, but TBH, I am not so familiar with srcu - where you going to try this? Hi John, Have you received the following patch: "[PATCH] blk-mq: Fix races between iterating over requests and freeing requests" (https://lore.kernel.org/linux-block/20210319010009.10041-1-bvanassche@acm.org/)? Thanks, Bart.