From nobody Sun Feb 8 11:22:16 2026 Received: from out30-113.freemail.mail.aliyun.com (out30-113.freemail.mail.aliyun.com [115.124.30.113]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 92D2425A2A4 for ; Fri, 17 Oct 2025 07:53:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.113 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760687628; cv=none; b=H6rdsgLBOhGOfz+oC/zuuJ0k5erDRRGFGus9v+2ndYH8MYq8FLmTFenrXm/rKLKaTPKaNNcOYOzuczM6/47Ngye4241odLwQVRajJWe27oPPLa24s1Plp0bsoCiVcWyxydAL9nc4g2Z8vxxFMHWT1FfOsWnWGbNl56t/YazgpCc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760687628; c=relaxed/simple; bh=jmTav0LD6uHB/CeeFFtp58fzJPAWJOfH/X2W35DCJ7Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=BTZ4lkaKIF1vq7Nd5Tff2JUfGtBZetyU4wVyyXnMVzzfg0WrMsJYQyL0o4oLC8ycFYihrgUIyB8tINVvrFXO/niGBNLefXl/U9tnb4LpHzXaaFZeXsd42dYNYiS9fwWkcX7N1l2/cfM7hUrxNiJPte1UVcQbkcrgUJHsz/+Xe9I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b=CeFEqUky; arc=none smtp.client-ip=115.124.30.113 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="CeFEqUky" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1760687623; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=D0OKcU2IWVvgxpGGM/x3bGo2RcncD8hKQxZ9riDYf6c=; b=CeFEqUkyPd2kh2S8BKbobenqkv0L0goNojPFTGtOV+2u7dvOdt2r3Wos/kNaHltYt+f4oNt655wmqnIGcZL2noiOJrY7iMYetqTIerSM+x/J7DyCdvfO6pcjQ3sP4sfexPTabtnE0o/VVH8TSjdlDnCHJq5f45Wyk/jAltw7B7s= Received: from localhost(mailfrom:baolin.wang@linux.alibaba.com fp:SMTPD_---0WqPAmKl_1760687621 cluster:ay36) by smtp.aliyun-inc.com; Fri, 17 Oct 2025 15:53:42 +0800 From: Baolin Wang To: akpm@linux-foundation.org, hannes@cmpxchg.org Cc: david@redhat.com, mhocko@kernel.org, zhengqi.arch@bytedance.com, shakeel.butt@linux.dev, lorenzo.stoakes@oracle.com, hughd@google.com, willy@infradead.org, baolin.wang@linux.alibaba.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/2] mm: vmscan: filter out the dirty file folios for node_reclaim() Date: Fri, 17 Oct 2025 15:53:06 +0800 Message-ID: X-Mailer: git-send-email 2.43.7 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" After commit 6b0dfabb3555 ("fs: Remove aops->writepage"), we no longer attempt to write back filesystem folios in pageout(), and only tmpfs/shmem folios and anonymous swapcache folios can be written back. Therefore, we should also filter out the dirty filesystem folios for node_reclaim() to avoid unnecessary LRU scans. Signed-off-by: Baolin Wang --- mm/vmscan.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index c80fcae7f2a1..65f299e4b8f0 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -7601,9 +7601,11 @@ static unsigned long node_pagecache_reclaimable(stru= ct pglist_data *pgdat) else nr_pagecache_reclaimable =3D node_unmapped_file_pages(pgdat); =20 - /* If we can't clean pages, remove dirty pages from consideration */ - if (!(node_reclaim_mode & RECLAIM_WRITE)) - delta +=3D node_page_state(pgdat, NR_FILE_DIRTY); + /* + * Since we can't clean folios through reclaim, remove dirty file + * folios from consideration. + */ + delta +=3D node_page_state(pgdat, NR_FILE_DIRTY); =20 /* Watch for any possible underflows due to delta */ if (unlikely(delta > nr_pagecache_reclaimable)) --=20 2.43.7