From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792706538; b=oIf/PiishZhf7nbauP65ncVqjEH/U0nUxzMiieiMDd06VAQeTuD4Bg8UXdKKjKRJxuYm wOpOpuHa4VRZC9Q3UZRu+/qFsgkXomkxcqGP8WSFhn35A0GoQkxSLIhBd6HolZ//MMHQ7 rT47bQ0oqOP4VF9TmKOeTf5kfP8uSH39o7shgH9AyWZVUssXWfIElZL+lPClVYxMapTXk SVb0MSJjJbjCcoiRuMENWorkYHaRc11alJVdUN5KCCTZh7Nk3YfsuL73te9dgTWjAhhZM i+WwGetzu0K5cdoa2/s/fWm77S7gQWJUXoYB9uEypVczCPOLG07kobUwAl0YvQZFBUw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792706538; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-Id:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=63mK610jdToNP0YQ3Ph5BKb/f3otJucBqFL+kmib1dA=; b=sygr/sz+JsGkrgKx3ThlMCfSUxWmDcNf569s9kkYiVnrvT6PBKEHaW84oi1YiZ9x53iU 9UTPrVzQyQoX0S1ep89o60nRzHeuO09KqNSWh/vtVm+mgYW+8RqfNJU03JG2Wjsj3+X7d HaylzeMGoa2CYXO7PnWzkfWB2/hcOoIAt6y1k21nSqpjcFB+Z2mbTTSGxBSlq7RqEk7hN p/H8js/TmWlMjWpXi+00UC26ah6Ol4Ane5Q9gbwdugATD2QYJRCV2cflBlrrlC/EVTbSz 3FC3z6VRHKftR1v2kIlDVJTjQdJK3ixkV//IV71F3hfko9tcBOPQqqCNgGi99P1+tGw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=VsKE+RV9; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5FF96606A319 for ; Thu, 22 Oct 2026 22:02:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=VsKE+RV9 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 158011F01828; Thu, 22 Oct 2026 22:02:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792706537; bh=63mK610jdToNP0YQ3Ph5BKb/f3otJucBqFL+kmib1dA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=VsKE+RV9ZiFeOrwZDoTiUuwHB9vpcwRc4MSSz8a7z5neSmnRROEqC8EjB3KAUEHbU MFp/cNhWnW9ptktSNH4FF3LqxBovkVC3ekNfCkRxhj/WbiH06RUhaiUPjY5fE9ohku eEG2q56loqTFA2if8MKVcDXJIqHV+CXjILILaj370EAV7fWZqcykJ0VpfX3CvOM3J3 SPCvz9OLlv8FTMtxHWXdyhUOwRu3Y2WBXiL+JKVegV3UqvGOv+ZgVabTiGXnPDvkEc YLDhOgkx9c3YlWfoUP/CeyzP0QHv8Z8VXZ85VVUfOJdProkIUKWg45o5FflkxTEyQl dtVjWMF2in8ig== From: "Barry Song (Xiaomi)" To: akpm@linux-foundation.org, linux-mm@kvack.org Cc: hui.zhu@linux.dev, axelrasmussen@google.com, baohua@kernel.org, baolin.wang@linux.alibaba.com, david@kernel.org, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, ljs@kernel.org, mhocko@kernel.org, qi.zheng@linux.dev, ryncsn@gmail.com, shakeel.butt@linux.dev, weixugc@google.com, yuanchu@google.com, zhuhui@kylinos.cn, baoquan.he@linux.dev, liuxiang.277@bytedance.com, wangzicheng@honor.com, lianux.mm@gmail.com, kasong@tencent.com, liam@infradead.org, surenb@google.com, mhocko@suse.com, rppt@kernel.org, zhangbo56@xiaomi.com, lyugaofei@xiaomi.com, ridong.chen@linux.dev, kunwu.chan@gmail.com Subject: [RFC PATCH v5 01/14] mm/mglru: report evictable sizes per type Date: Fri, 23 Oct 2026 06:01:50 +0800 Message-Id: <20261022220203.91911-2-baohua@kernel.org> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20261022220203.91911-1-baohua@kernel.org> References: <20261022220203.91911-1-baohua@kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Kairui Song Change lruvec_evictable_size() to return the number of evictable anonymous and file pages separately instead of a single total, so that callers can weigh the two types independently. Update lruvec_is_sizable() and get_nr_to_scan() accordingly; the summed totals are unchanged, so there is no functional change. Signed-off-by: Kairui Song Signed-off-by: Barry Song (Xiaomi) --- mm/vmscan.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index fc823fe3bd1f..3be0d6c04a82 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -4332,32 +4332,35 @@ static void set_initial_priority(struct pglist_data *pgdat, struct scan_control sc->priority = clamp(priority, DEF_PRIORITY / 2, DEF_PRIORITY); } -static unsigned long lruvec_evictable_size(struct lruvec *lruvec, int swappiness) +static void lruvec_evictable_size(struct lruvec *lruvec, int swappiness, + unsigned long nr[]) { int gen, type, zone; - unsigned long seq, total = 0; + unsigned long seq; struct lru_gen_folio *lrugen = &lruvec->lrugen; DEFINE_MAX_SEQ(lruvec); DEFINE_MIN_SEQ(lruvec); + nr[LRU_GEN_ANON] = 0; + nr[LRU_GEN_FILE] = 0; + for_each_evictable_type(type, swappiness) { for (seq = min_seq[type]; seq <= max_seq; seq++) { gen = lru_gen_from_seq(seq); for (zone = 0; zone < MAX_NR_ZONES; zone++) - total += max(READ_ONCE(lrugen->nr_pages[gen][type][zone]), 0L); + nr[type] += max(READ_ONCE(lrugen->nr_pages[gen][type][zone]), 0L); } } - - return total; } static bool lruvec_is_sizable(struct lruvec *lruvec, struct scan_control *sc) { - unsigned long total; + unsigned long total, sizes[ANON_AND_FILE]; int swappiness = get_swappiness(lruvec, sc); struct mem_cgroup *memcg = lruvec_memcg(lruvec); - total = lruvec_evictable_size(lruvec, swappiness); + lruvec_evictable_size(lruvec, swappiness, sizes); + total = sizes[LRU_GEN_ANON] + sizes[LRU_GEN_FILE]; /* whether the size is big enough to be helpful */ return mem_cgroup_online(memcg) ? (total >> sc->priority) : total; @@ -5181,7 +5184,7 @@ static bool should_run_aging(struct lruvec *lruvec, unsigned long max_seq, 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; + unsigned long nr_to_scan, evictable, sizes[ANON_AND_FILE]; struct pglist_data *pgdat = lruvec_pgdat(lruvec); /* @@ -5197,7 +5200,8 @@ static long get_nr_to_scan(struct lruvec *lruvec, struct scan_control *sc, return 0; } - evictable = lruvec_evictable_size(lruvec, swappiness); + lruvec_evictable_size(lruvec, swappiness, sizes); + evictable = sizes[LRU_GEN_ANON] + sizes[LRU_GEN_FILE]; /* try to scrape all its memory if this memcg was deleted */ if (!mem_cgroup_online(memcg)) -- 2.34.1