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X-CRM114-Status: GOOD ( 14.42 ) 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: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On 09/04/2025 10:01, Christoph Hellwig wrote: > On Tue, Apr 08, 2025 at 09:08:18PM +0000, Chaitanya Kulkarni wrote: >>> >>> I think the awupf belongs in the nvme_ctrl structure. >> >> AWUPF is a part of Identify controller data structure so Ideally >> it should be part of the controller attribute. > > It is subsystem scoped really, and controllers should not differ > in the values as that would break multipath setups. > > Unfortunately nvme doesn't have an identify subsystem and generally > is extremely sloppy about scopes. > > This, combined with no dedicated NVMe command to issue a write atomically (which could error for out-of-limits size/crossing boundary), is pretty concerning. As an aside, I found the scope of the boundary definition to be quite vague as well.