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From: Muchun Song In-Reply-To: <20260128135500.22121-11-kas@kernel.org> Date: Thu, 29 Jan 2026 10:51:48 +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 , Huacai Chen , WANG Xuerui , Palmer Dabbelt , Paul Walmsley , Albert Ou , Alexandre Ghiti , kernel-team@meta.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, loongarch@lists.linux.dev, linux-riscv@lists.infradead.org Content-Transfer-Encoding: 7bit Message-Id: <1E5F65B7-59C0-463D-95EA-808520C14B85@linux.dev> References: <20260128135500.22121-1-kas@kernel.org> <20260128135500.22121-11-kas@kernel.org> To: Kiryl Shutsemau X-Migadu-Flow: FLOW_OUT X-Stat-Signature: ieohntjfcibba4y3hhcyqayhggroqher X-Rspamd-Queue-Id: B05D2140006 X-Rspam-User: X-Rspamd-Server: rspam04 X-HE-Tag: 1769655157-342321 X-HE-Meta: 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 pnmuPojF eIGNKlP+3+L/p5aA8ZDJYjpRaRke/GjbBAS+msKLPYVOpNd8VAadBDtRLZ7+vUsz+oI1yfa9hUamlO8uxVzNUo2ZAmqbSpaYXRyEn5rVcc5Z5UayH6KDPAjG85CW6C6j4ZV68bOroV99gpWbwvC3M3AFvNL1yln/4egg2UvSyjGe2AY8fRztygDR0WxeMvSvfxF4io8ySVzam2Rhep2VwT5FgW1w5xv1v5FgQlmA81GoyAyKEOhOzR+0xoJBYFwF+T1Ci5WBKWpZeTqEV6lKB216F39iW9xGtZaCe1+7U+2U+0cODXSJZxrYSsw== 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 Jan 28, 2026, at 21:54, Kiryl Shutsemau wrote: > > To prepare for removing fake head pages, the vmemmap_walk code is being > reworked. > > The reuse_page and reuse_addr variables are being eliminated. There will > no longer be an expectation regarding the reuse address in relation to > the operated range. Instead, the caller will provide head and tail > vmemmap pages. > > Currently, vmemmap_head and vmemmap_tail are set to the same page, but > this will change in the future. > > The only functional change is that __hugetlb_vmemmap_optimize_folio() > will abandon optimization if memory allocation fails. > > Signed-off-by: Kiryl Shutsemau Reviewed-by: Muchun Song Thanks.