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=1794694243; b=4YSzTcMMZ7jA5zIcHYeYM6zdBzlLG5WZFDkQ97zsUNHic8OEDMFOsXF70m7/3mswiiaT TcnGH+fU3KxH6PoKOq4xWYVfkLXxygg9jJF1dZ8ad8nEKiumoACnAevF2wj23ABJpqKHH jnWDmX7K5JYaICgESe0iNoU8Y3A5MFdE1jFr85OlVbxm8K3V41NlrNM9ojRobmmyJARrN 05+p4wV9ZanNDkVcA8dk827hxon00jUzoF7hXzcsQP7uY4Gfd0zSpQCtC5VjpiqrwpxLm 1GOmZfxkRByGTBJU8SH23P+1scrgij0l2wH+hjb24JQktR5XEhutNFJOYVECc/olNnw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794694243; h=Received:DKIM-Signature:Date:To:From:Subject:Message-Id; bh=XtnQFpK9ECg9X5/1N30dQHKEAx4koNSrXpraLaTClP0=; b=oyGZBH766rxJfoXf2S6ql5J2AbZnZ3+li479tiz15Q0CMNFALW3VG32lSxn7CIaI6SCt 2F7sIL9kTmRxQSgn+mrOgiA5TeGdb2Bv0yoHQbfApz6f5dzQVbfpA8+GoHz3rDnD9ZyYX hQX17Cixp0vYpNS0HOeJZA/RMVIwdKr4gAoq7UDq0A1ski8FwHBbG8OjlAgllu+mspCFi +HUM3QuWukpCVgMHmZqM97M/b5KGvt630Ku+yy2HUJp6z6utOJkRHZ9ZiLi+6UpiTPZT0 /AYLu/M3KvgQLt/X6jlM4iUHZF0ZO8tXP+av0Cxjf+sLdJtI8wulOGifBRyS/bZIHXA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linux-foundation.org header.i=@linux-foundation.org header.a=rsa-sha256 header.s=korg header.b=fJ1jNeGq; 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 615A7606A327 for ; Sat, 14 Nov 2026 22:10:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.a=rsa-sha256 header.s=korg header.b=fJ1jNeGq Received: by smtp.kernel.org (Postfix) with ESMTPSA id E72171F000C4; Sat, 14 Nov 2026 22:10:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1794694243; bh=XtnQFpK9ECg9X5/1N30dQHKEAx4koNSrXpraLaTClP0=; h=Date:To:From:Subject; b=fJ1jNeGqgrDd64xZT2BmqnK5Q4Wl5fVHkvx4JVbMU7s6AvcVgVfgMHbwuvoAbJ4XG rX36vJEUVDlng7IdJsj/qcbBWk6+blIKY5cF2YWBRchLUplJjUcIN7tbDR+HekM2u5 ICyIYU9XaWjmVux62vuInbvBzWtOhxUHMEAAS/g8= Date: Sat, 14 Nov 2026 14:10:42 -0800 To: mm-commits@vger.kernel.org,kasong@tencent.com,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-mglru-return-for-unavailable-anon-reclaim-earlier.patch added to mm-new branch Message-Id: <20261114221042.E72171F000C4@smtp.kernel.org> X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list The patch titled Subject: mm/mglru: return for unavailable anon reclaim earlier has been added to the -mm mm-new branch. Its filename is mm-mglru-return-for-unavailable-anon-reclaim-earlier.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-mglru-return-for-unavailable-anon-reclaim-earlier.patch This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. The mm-new branch of mm.git is not included in linux-next If a few days of testing in mm-new is successful, the patch will me moved into mm.git's mm-unstable branch, which is included in linux-next Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: Kairui Song Subject: mm/mglru: return for unavailable anon reclaim earlier Date: Sun, 15 Nov 2026 04:07:53 +0800 No feature change, just shuffle some code, prepare for later commits. Link: https://lore.kernel.org/20261114200803.23129-7-baohua@kernel.org Signed-off-by: Kairui Song Signed-off-by: Barry Song (Xiaomi) Signed-off-by: Andrew Morton Reviewed-by: Kunwu Chan Cc: Axel Rasmussen Cc: Baolin Wang Cc: Baoquan He Cc: Johannes Weiner Cc: Cc: Liam R. Howlett Cc: wang lian Cc: Cc: Cc: Michal Hocko Cc: Qi Zheng Cc: Ridong Chen Cc: Mike Rapoport Cc: Kairui Song Cc: Shakeel Butt Cc: Suren Baghdasaryan Cc: wangzicheng Cc: Wei Xu Cc: Yuanchu Xie Cc: Bo Zhang Cc: Hui Zhu Cc: Siddharth Chintamaneni Cc: Kunwu Chan Cc: Bo Zhang mm/vmscan.c | 27 +++++++++++++-------------- 1 file changed, 13 insertions(+), 14 deletions(-) --- a/mm/vmscan.c~mm-mglru-return-for-unavailable-anon-reclaim-earlier +++ a/mm/vmscan.c @@ -5060,20 +5060,6 @@ static long get_nr_to_scan(struct lruvec 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 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; _ Patches currently in -mm which might be from kasong@tencent.com are mm-mglru-report-evictable-sizes-per-type.patch mm-mglru-extract-lruvec_populated_min_seq-helper.patch mm-mglru-reclaim-from-the-oldest-populated-gen.patch mm-mglru-lift-the-forced-protection-of-reclaimer.patch mm-mglru-skip-zones-above-reclaim_idx-instead-of-rotating-them.patch mm-mglru-return-for-unavailable-anon-reclaim-earlier.patch mm-mglru-balance-anon-and-file-scan-budget-by-refault-rate.patch mm-mglru-lift-youngest-gen-protection-for-higher-priority.patch