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Sun, 17 May 2026 11:52:03 -0700 (PDT) Date: Sun, 17 May 2026 18:52:02 +0000 From: Pasha Tatashin To: Mike Rapoport Cc: Pasha Tatashin , linux-kselftest@vger.kernel.org, shuah@kernel.org, akpm@linux-foundation.org, linux-mm@kvack.org, skhan@linuxfoundation.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, corbet@lwn.net, dmatlack@google.com, kexec@lists.infradead.org, pratyush@kernel.org, skhawaja@google.com, graf@amazon.com Subject: Re: [PATCH v2 05/10] liveupdate: defer session block allocation and PA setting Message-ID: References: <20260514222628.931312-1-pasha.tatashin@soleen.com> <20260514222628.931312-6-pasha.tatashin@soleen.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspam-User: X-Rspamd-Queue-Id: 03B21100009 X-Rspamd-Server: rspam04 X-Stat-Signature: btefat6h58zjdw6g9o76kwhirw3h86kp X-HE-Tag: 1779043925-820029 X-HE-Meta: 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 LaDOoLKT yyu/Jebi4FukdWZIn9ukDBy9YtLXUGNTOQNwKcEcbaIXhHOpqQe2GgVBlSd9FOJiloPK3NfmkSGYp2BuOuwBBApFd/lR5mq0gPLh+HxOFGXOzdbEWFv/ZUquYznuDFoDaV3acT/NNvxOLSeh1BmtRu9k/naQ0HbGKyKNz7If/IgDvj1tZfmlU45ZM/TgjNcRWqmsLWzE4nRxtL9ZHKiugkLF0BKTUmKZOsPBIkU2cbuunXbpPXHWrExDnj9ED6BJwM6gCIvgzwWTLmKyYO1K45SM+qR4Wifn0CGAVI6hNLXfl1tDhvxw2url75FvVDxdy+eP5Tf1KDy+5imVY+Z8vCOULnRyceA0pKHKBZxHljS9pT+m5mluFKJzG9gOQrd/lBOsUeNWClRmC3JY= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 05-17 20:31, Mike Rapoport wrote: > On Thu, May 14, 2026 at 10:26:23PM +0000, Pasha Tatashin wrote: > > Currently, luo_session_setup_outgoing() allocates the session block and > > sets its physical address in the header immediately. With upcoming > > dynamic block-based session management, this makes the first block > > different from the rest. Move the allocation to where it is first needed. > > > > Signed-off-by: Pasha Tatashin > > Acked-by: Mike Rapoport (Microsoft) > > > --- > > @@ -77,15 +77,16 @@ > > > > /** > > * struct luo_session_header - Header struct for managing LUO sessions. > > - * @count: The number of sessions currently tracked in the @list. > > - * @list: The head of the linked list of `struct luo_session` instances. > > - * @rwsem: A read-write semaphore providing synchronized access to the > > - * session list and other fields in this structure. > > - * @header_ser: The header data of serialization array. > > - * @ser: The serialized session data (an array of > > - * `struct luo_session_ser`). > > - * @active: Set to true when first initialized. If previous kernel did not > > - * send session data, active stays false for incoming. > > + * @count: The number of sessions currently tracked in the @list. > > + * @list: The head of the linked list of `struct luo_session` instances. > > + * @rwsem: A read-write semaphore providing synchronized access to the > > + * session list and other fields in this structure. > > + * @header_ser: The header data of serialization array. > > + * @ser: The serialized session data (an array of > > + * `struct luo_session_ser`). > > + * @sessions_pa: Points to the location of sessions_pa within struct luo_ser. > > + * @active: Set to true when first initialized. If previous kernel did not > > + * send session data, active stays false for incoming. > > Hmm, why addition of a single field changed the entire block? :/ Yes, I had to decide whether to shorten the field name or change the entire block. I opted for the latter. :-) > > > */ > > struct luo_session_header { > > long count; > > -- > Sincerely yours, > Mike.