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bh=Rbf3ODCn28ZF0d7+U04laU0GN4Tl9A4x506ilfnoj8k=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=fprzCg4DV5a+sKOrvMCSEHUHYXDixSlpUtiMZ3iT9aOZBMDTTzIxCg09st2uD7QMo /DyhKM+9bkRtkLPibys9L1bMVZ4IXNfo0/V/C+Tak0UK8qmIW2jVzTZPyGtPREtbTw paSdghLTKcTTtyxp6bjJHw8o987eVwIDium9roSWRcaZasNCtHE8pEZ3DhM+fbXz2S tHDPSDn7fkTbij1XUvjDLqzcjUGAa2YOTOyJeiU/Zdmdb9V9kUdLyAPJpJcX3jM3v/ KK2YQi7HATCfkq8iTMR7GDcBOOJVymn2eiW1dzR1BdCR2gczsTCkxBLDfQwl/XBpMw QehrS2DTFB6Ng== From: "Barry Song (Xiaomi)" To: akpm@linux-foundation.org, linux-mm@kvack.org Cc: axelrasmussen@google.com, baolin.wang@linux.alibaba.com, baoquan.he@linux.dev, hannes@cmpxchg.org, hui.zhu@linux.dev, kasong@tencent.com, kunwu.chan@gmail.com, liam@infradead.org, lianux.mm@gmail.com, linux-kernel@vger.kernel.org, liuxiang.277@bytedance.com, lyugaofei@xiaomi.com, mhocko@kernel.org, mhocko@suse.com, qi.zheng@linux.dev, ridong.chen@linux.dev, rppt@kernel.org, ryncsn@gmail.com, shakeel.butt@linux.dev, surenb@google.com, wangzicheng@honor.com, weixugc@google.com, yuanchu@google.com, zhangbo56@xiaomi.com, zhuhui@kylinos.cn, sidchintamaneni@gmail.com, Barry Song Subject: [PATCH v8 06/16] mm/mglru: return for unavailable anon reclaim earlier Date: Sat, 14 Nov 2026 02:55:31 +0800 Message-Id: <20261113185541.70203-7-baohua@kernel.org> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20261113185541.70203-1-baohua@kernel.org> References: <20261113185541.70203-1-baohua@kernel.org> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: bdgne88rr4twb9kdo1my8xrar9h1odnk X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 23C5940007 X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_PASS, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-HE-Tag: 1794596179-414764 X-HE-Meta: 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 1+C9ugVx Q3XnxMj5UDF2jcp0Sc6mGHbJcJO8MuTsT/0eyWoyb+ERnue7qRlyzh7rGi5+0b+lcXvF36OGMFLgSDi0fhAPuM5JRLJDeeUfxkozR0Q1b8iJrgcZEKQZKzbvOwPA3l+T4tWzHFD4W3MCUWXXKK5w1w1FFFBZT/gEaMqp/7BlEYbTFVUSBTv1aW9EA4xOHOIabkVue7tz86DpyPUn4FdhGv4SkXq0HVInlAXGDXqfB/cXpFuf3PinUnUqvyR0bMYu0ZAHbdyGQK+Yt/YczpykXKNu5PP9CXcjTCZg1+brM1mj/PuGEcNe2rDps84MDiMNnfh3GTEY+QvDBm1E2Maj6Ik6+sn9j8H+y59uX Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 From: Kairui Song No feature change, just shuffle some code, prepare for later commits. Signed-off-by: Kairui Song Signed-off-by: Barry Song (Xiaomi) Reviewed-by: Kunwu Chan --- mm/vmscan.c | 27 +++++++++++++-------------- 1 file changed, 13 insertions(+), 14 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index a6e9e755e4b2..7a21890ebeff 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -5060,20 +5060,6 @@ static long get_nr_to_scan(struct lruvec *lruvec, struct scan_control *sc, struct mem_cgroup *memcg, int swappiness) { unsigned long nr_to_scan, evictable, sizes[ANON_AND_FILE]; - struct pglist_data *pgdat = lruvec_pgdat(lruvec); - - /* - * Proactive reclaim initiated by userspace for anonymous memory only. - * SWAPPINESS_ANON_ONLY is set only on the proactive reclaim path, so - * warn if it shows up elsewhere. When anon cannot be reclaimed (e.g. - * no swap), return 0 to skip the scan entirely, avoiding useless scan - * work when there is nothing eligible to reclaim. - */ - if (swappiness == SWAPPINESS_ANON_ONLY) { - WARN_ON_ONCE(!sc->proactive); - if (!can_reclaim_anon_pages(memcg, pgdat->node_id, sc)) - return 0; - } lruvec_evictable_size(lruvec, swappiness, sizes); evictable = sizes[LRU_GEN_ANON] + sizes[LRU_GEN_FILE]; @@ -5126,6 +5112,19 @@ static bool try_to_shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc) int swappiness = get_swappiness(lruvec, sc); struct mem_cgroup *memcg = lruvec_memcg(lruvec); + /* + * Proactive reclaim initiated by userspace for anonymous memory only. + * SWAPPINESS_ANON_ONLY is set only on the proactive reclaim path, so + * warn if it shows up elsewhere. When anon cannot be reclaimed (e.g. + * no swap), return 0 to skip the scan entirely, avoiding useless scan + * work when there is nothing eligible to reclaim. + */ + if (swappiness == SWAPPINESS_ANON_ONLY) { + WARN_ON_ONCE(!sc->proactive); + if (!can_reclaim_anon_pages(memcg, lruvec_pgdat(lruvec)->node_id, sc)) + return false; + } + nr_to_scan = get_nr_to_scan(lruvec, sc, memcg, swappiness); while (nr_to_scan > 0) { int delta; -- 2.39.3 (Apple Git-146)