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Mon, 17 Nov 2025 12:24:43 -0800 (PST) From: Mohamed Khalfella To: Jens Axboe , Keith Busch , Sagi Grimberg , Chaitanya Kulkarni Cc: Casey Chen , Vikas Manocha , Yuanyuan Zhong , Hannes Reinecke , Ming Lei , linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, Mohamed Khalfella Subject: [PATCH v2 0/1] nvme: Convert tag_list mutex to rwsemaphore to avoid deadlock Date: Mon, 17 Nov 2025 12:23:52 -0800 Message-ID: <20251117202414.4071380-1-mkhalfella@purestorage.com> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Changes from v1: - Keep existing behavior do not freeze newly added "q" when transitioning tagset from unshared to shared. - Delete blk_mq_update_tag_set_shared() and explicitly freeze "firstq" and "q" and set their shared status. - Add comment explaining why we are downgrading the semaphore before freezing "firstq". v1: https://lore.kernel.org/all/20251113202320.2530531-1-mkhalfella@purestorage.com/ Mohamed Khalfella (1): nvme: Convert tag_list mutex to rwsemaphore to avoid deadlock block/blk-mq-sysfs.c | 10 ++--- block/blk-mq.c | 95 +++++++++++++++++++++++------------------- include/linux/blk-mq.h | 4 +- 3 files changed, 58 insertions(+), 51 deletions(-) -- 2.51.0