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bh=svLW62vkvxW0xvIszMrXeZ8SojWKg92Vr+WIfieUekQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=TjnvK/YAvvUg9oKn3idKeHXGSn/xtyNOamiw70cQDIAFP5WSiK2eLBsHazNOvcg9O 4JHACPddPsMkjq9uMu1edkXnSz2+0GQow2ewXV7NsjqcQ0+D6Zik7pnPHmbZXoMLmr XwtPv4vDw7lmTX3EYyFc0IvbmOQE/Bv+KwbWt+/j3ePbd60RjfG9ZbFl6erx3HkWIO f+CVKm2qdTCrob5En9s50yZGXulzGCmZ3/5XlrEqrms4yIVd4zFe4j3yuD2jl/Vgr/ 99O0Y0/tNKoisx0UD4VMoFtx1JqOqpngayT9B3E3rqqFpFeKTvS1ISlW76Rb5lacRn JL1IWyIV4+1Uw== 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 v6 06/15] mm/mglru: return for unavailable anon reclaim earlier Date: Wed, 11 Nov 2026 04:20:16 +0800 Message-Id: <20261110202025.25736-7-baohua@kernel.org> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20261110202025.25736-1-baohua@kernel.org> References: <20261110202025.25736-1-baohua@kernel.org> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 6194BC000B X-Stat-Signature: rswbr3zc8o1n98fi4jkqg9xr8tuseg5o X-Rspam-User: X-HE-Tag: 1794342067-624616 X-HE-Meta: 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 mGxJ5Su1 JIv2Bfi1ABOaxkyrJ5t9BPDjDAXyWRHt2vzpHsLcNInKLENtJlYBQDGTBWUzb/CN7sN47q0DRY0tvJfsrncMAR2a4eHAwbmnw3lKCE4N1fFcN79eepSbMmUv6SCdH+2CeZKLU1dKKpFAbFHgPsfsnDlopGiTo+KVYLsa4pgd3rXdBXtXsHXkMsokoSzOjovtpLxekQ9OeH33o/e4E/W4Fm+GbJGaNTJ2hJZo6dyU4JNVI68m1YNoy3F01Pxt+/AdJeOWO2wkP90/K9jrPkTLM+0qZkjyihcbHtxmRYpKvsOXMqmE/gsd3uw2/3hTidRd0uHj+DyszSGGFj8+14q5QPvml8Dq+oNLiyb8g 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 6b1670677974..e2807faf26de 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -5055,20 +5055,6 @@ 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]; @@ -5121,6 +5107,19 @@ 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; -- 2.34.1