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From: Muchun Song In-Reply-To: <20251218150949.721480-5-kas@kernel.org> Date: Mon, 22 Dec 2025 11:00:00 +0800 Cc: Andrew Morton , David Hildenbrand , Matthew Wilcox , Usama Arif , Frank van der Linden , Oscar Salvador , Mike Rapoport , Vlastimil Babka , Lorenzo Stoakes , Zi Yan , Baoquan He , Michal Hocko , Johannes Weiner , Jonathan Corbet , kernel-team@meta.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Content-Transfer-Encoding: 7bit Message-Id: <98BDC08B-9A77-44BE-8BBD-FF9F8E4A6DF4@linux.dev> References: <20251218150949.721480-1-kas@kernel.org> <20251218150949.721480-5-kas@kernel.org> To: Kiryl Shutsemau X-Migadu-Flow: FLOW_OUT X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: B2BF62000A X-Stat-Signature: 1y1kqss48znsed6okpcsn8qzgwwo193r X-Rspam-User: X-HE-Tag: 1766372450-761738 X-HE-Meta: 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 bRhn9+fV DuBLauqe4sua0a/B7dFw2ThA5/dGgbSBuC9fPlrGB48ToACH+TiIDIccrK0ctffZSAkYbQ/qtd9I+nqmll/lF/LLXt3LIE5RLvO3najDnENED1LQ1FVUfgjvzKXKQrqQoExIsllEXQ1FE8pG7sxRAM+AbiYIyay3DIlZlMhWCrOMUxmE+RLoOSFQg4LAUd6UTN1pShIbJD97HY8dqb5I1pgr6u9t2oDdRaXcCL5gD7JOQ04mB3VGyOPVR8Nw5MjhPcU5ugqICpGhwCjZXA2VA20DdCuJzra9mZfmMsyjrLRrW0NoU0UH5ZepzKA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: > On Dec 18, 2025, at 23:09, Kiryl Shutsemau wrote: > > The 'compound_head' field in the 'struct page' encodes whether the page > is a tail and where to locate the head page. Bit 0 is set if the page is > a tail, and the remaining bits in the field point to the head page. > > As preparation for changing how the field encodes information about the > head page, rename the field to 'compound_info'. > > Signed-off-by: Kiryl Shutsemau Reviewed-by: Muchun Song Thanks.