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[172.10.233.147]) by smtp.gmail.com with ESMTPSA id 00721157ae682-723a85a0cd9sm56756867b3.69.2025.09.08.15.12.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Sep 2025 15:12:37 -0700 (PDT) Date: Mon, 8 Sep 2025 15:12:20 -0700 (PDT) From: Hugh Dickins To: Andrew Morton cc: Alexander Krabler , "Aneesh Kumar K.V" , Axel Rasmussen , Chris Li , Christoph Hellwig , David Hildenbrand , Frederick Mayle , Jason Gunthorpe , Johannes Weiner , John Hubbard , Keir Fraser , Konstantin Khlebnikov , Li Zhe , Matthew Wilcox , Peter Xu , Rik van Riel , Shivank Garg , Vlastimil Babka , Wei Xu , Will Deacon , yangge , Yuanchu Xie , Yu Zhao , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v2 0/6] mm: better GUP pin lru_add_drain_all() Message-ID: <41395944-b0e3-c3ac-d648-8ddd70451d28@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Series of lru_add_drain_all()-related patches, arising from recent mm/gup migration report from Will Deacon. Based on 6.17-rc3 but apply to replace v1 in mm.git. I suggest all but 6/6 be hotfixes going to 6.17 and stable. v1 was at https://lore.kernel.org/linux-mm/a28b44f7-cdb4-8b81-4982-758ae774fbf7@google.com/ amd its 1/7 mm: fix folio_expected_ref_count() when PG_private_2 has been dropped from v2, per Matthew Wilcox. 1/6 mm/gup: check ref_count instead of lru before migration v1->v2: paragraph on PG_private_2 added to commit message 2/6 mm/gup: local lru_add_drain() to avoid lru_add_drain_all() v1->v2: lru_add_drain() only when needed, per David 3/6 mm: Revert "mm/gup: clear the LRU flag of a page before v1->v2: Acked-by David added 4/6 mm: Revert "mm: vmscan.c: fix OOM on swap stress test" v1->v2: Acked-by David added 5/6 mm: folio_may_be_lru_cached() unless folio_test_large() v1->v2: folio_may_be_lru_cached(): lru_ per David 6/6 mm: lru_add_drain_all() do local lru_add_drain() first v1->v2: Acked-by David added include/linux/swap.h | 10 ++++++++ mm/gup.c | 14 ++++++++--- mm/mlock.c | 6 ++-- mm/swap.c | 53 +++++++++++++++++++++++-------------------- mm/vmscan.c | 2 - 5 files changed, 54 insertions(+), 31 deletions(-) Thanks, Hugh