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bh=svLW62vkvxW0xvIszMrXeZ8SojWKg92Vr+WIfieUekQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=hebxcBgmWepyx7VjbguRAqqK17gGACZTgFgv4nuQqAUoBo2S80BMonpgiyWcFu3Kw qr+0XdOMyL/g58305NxMlAkn2m0MMuSNzoJ6mOOxVo5dZH//ks4GTGqvTO6Q7s9fws 1RtjJBcerT5lWeuMyl8P7Rb4wZgUBSyi4Sh9QBOfwbAIIk7hZ6TjnAtcYipuTU8SbA EwWSB8+reOYIcGhJhqwG9u8I20Xp6ovAe90r7DzH+u4ilbQV+5z3nfKN/QisjsjTMk iZej9gAtV5yMKNwQumbjWGcM6NatLRZmWktNDZTYz/Trs3HdKWUwpNTqNmJUpulvDR Ccien+d1qIVTA== From: "Barry Song (Xiaomi)" To: akpm@linux-foundation.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, linux-mm@kvack.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 v7 06/16] mm/mglru: return for unavailable anon reclaim earlier Date: Thu, 12 Nov 2026 07:25:53 +0800 Message-Id: <20261111232603.9934-7-baohua@kernel.org> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20261111232603.9934-1-baohua@kernel.org> References: <20261111232603.9934-1-baohua@kernel.org> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: tr8k44p7jqxzjjthh9nwaowtgto5t79y X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: E5C091C0009 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: 1794439603-831866 X-HE-Meta: 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 1pecME76 4ialRUnn6WYNExkN+b90H/cqOXPFoSuFW23H25KhXlvIXd4+KklYhyUNjYNliqGce9caBsDw6BssCXCbRPlfhaBX6pMHIxqPBa6dcwFj9sd5rf1NSKsookAdmDTIMW+9WU08K5S+ETuR1oC1800YdcHN03aaZxiqfq1E1KkjGSt0TGc7KM/W2KeWqD3mi9YR4FGa3lUjXkupxsS3/+LxIq1moR6zfuc37iwJ2hO+9DHtKQJaSx6rd3Q+tb33H54u0faD8g7EqGpsu1v53UIsZDedT1XMeTZtW6lQxXMB+D1QmDI9jincalI3Ow2hEhaCoGhzIKANOxHvwykTtUcghPGub8GzCE8V0GS6d 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