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[84.247.152.65]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-396ddc555b0sm977985a91.13.2026.08.27.22.27.14 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Thu, 27 Aug 2026 22:27:25 -0700 (PDT) From: Lian Wang To: Kairui Song via B4 Relay Cc: linux-mm@kvack.org, Andrew Morton , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Baoquan He , Shakeel Butt , Johannes Weiner , Michal Hocko , Roman Gushchin , Muchun Song , Chris Li , Baolin Wang , Ridong Chen , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Yu Zhao , Zi Yan , Qi Zheng , cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, Kairui Song , Kairui Song Subject: Re: [PATCH v3 3/6] mm/migrate: copy all referenced state via folio_migrate_lru_refs Date: Fri, 28 Aug 2026 13:26:32 +0800 Message-ID: <20260828052702.52673-1-lianux.mm@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260826-mglru-flags-cleanup-v3-3-d9f1c75549c8@tencent.com> References: <20260826-mglru-flags-cleanup-v3-0-d9f1c75549c8@tencent.com> <20260826-mglru-flags-cleanup-v3-3-d9f1c75549c8@tencent.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit > Transfer the reference state first, before the destination folio is > marked uptodate, so a concurrent lockless reader cannot have its > reference update overwritten by the copy. Reviewed-by: Lian Wang