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Tue, 30 Dec 2025 08:02:45 -0800 (PST) From: Jens Axboe To: Cong Zhang Cc: linux-arm-msm@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20251230-blk_mq_no_ctx_checking-v1-1-2168131383e6@oss.qualcomm.com> References: <20251230-blk_mq_no_ctx_checking-v1-1-2168131383e6@oss.qualcomm.com> Subject: Re: [PATCH] blk-mq: skip CPU offline notify on unmapped hctx Message-Id: <176711056497.410043.6155561525733424852.b4-ty@kernel.dk> Date: Tue, 30 Dec 2025 09:02:44 -0700 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 On Tue, 30 Dec 2025 17:17:05 +0800, Cong Zhang wrote: > If an hctx has no software ctx mapped, blk_mq_map_swqueue() never > allocates tags and leaves hctx->tags NULL. The CPU hotplug offline > notifier can still run for that hctx, return early since hctx cannot > hold any requests. > > Applied, thanks! [1/1] blk-mq: skip CPU offline notify on unmapped hctx commit: 10845a105bbcb030647a729f1716c2309da71d33 Best regards, -- Jens Axboe