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Mon, 11 Aug 2025 07:01:44 -0700 (PDT) From: Jens Axboe To: Ming Lei , Caleb Sander Mateos , Uday Shankar Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20250808-ublk_quiesce2-v1-1-f87ade33fa3d@purestorage.com> References: <20250808-ublk_quiesce2-v1-1-f87ade33fa3d@purestorage.com> Subject: Re: [PATCH] ublk: don't quiesce in ublk_ch_release Message-Id: <175492090390.697940.8796642091342962699.b4-ty@kernel.dk> Date: Mon, 11 Aug 2025 08:01:43 -0600 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Mailer: b4 0.14.3-dev-2ce6c On Fri, 08 Aug 2025 15:44:43 -0600, Uday Shankar wrote: > ublk_ch_release currently quiesces the device's request_queue while > setting force_abort/fail_io. This avoids data races by preventing > concurrent reads from the I/O path, but is not strictly needed - at this > point, canceling is already set and guaranteed to be observed by any > concurrently executing I/Os, so they will be handled properly even if > the changes to force_abort/fail_io propagate to the I/O path later. > Remove the quiesce/unquiesce calls from ublk_ch_release. This makes the > writes to force_abort/fail_io concurrent with the reads in the I/O path, > so make the accesses atomic. > > [...] Applied, thanks! [1/1] ublk: don't quiesce in ublk_ch_release commit: 212c928d01e9ea1d1c46a114650b551da8ca823e Best regards, -- Jens Axboe