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=1794693545; b=ZtOLAZpPPOfxlkSzDEMqKkflCRZ7pRkoGWZVFvgigmjtyw5R/49GYIezRi08zQqqEom2 Q4ETqQKmeJRayqPcZEwtOWrSn9sVervbreL+xoiTrYvcjGaSLwFSBWYYPmTobPLo7Yhhr ajf2GlL/QtXWY4N3aN+Y82sQ9dDzQOdhiSqjs65jlxSKOGOxBWJ8GSU1DoSUKZn3INn6d zwDie600AHWJ2ZK/VbpTrKk7vr43lLAu8UGbMbursfpPsGMZ4ZHC0OlnfRd++iQaNIALf Y14e4jpmsri9rDIrRTl/Z8QD3IN1pjtjgEQkhbqtKyr6L/tsRU6V48AGbwpDVgv6e1w== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794693545; h=Received:DKIM-Signature:Date:To:From:Subject:Message-Id; bh=k9vh98/TSwkzAfZhr+Gb6u3wkrwUBOeVsDf24nVfYjs=; b=GpTiv68w5TZiirBtep+FJGhO+JXANC0Q2K+SK7ic7eELA5QZJkQ3A5pIHgRQloRaf+WG toG1QjjWm+XBuHpQi9CmqiOJtZ5PZyiHXhsD10WkKRpXpw0WgIce4ddNwLADGdIkAclOa I+gmeKgT1d/CnvzIPhooiOOZzvN4t61p0sCkdQnDDHGKvbhRWnbnfziSw2NgIoPsBn5Yi G5KtwDgiA79FYMP/bA9n5xDOU+ghRAtjdG3FgfIN5DBuotRLua772MWUTnbW2R9XJUC9O XN+Egcd1r75pmoofz++L+Rx1DtdTsrc5bVidM0502mLgM4I0P+NS33s5+YVbTOZ0GFw== 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=XVBVGx+y; 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 982D7606A331 for ; Sat, 14 Nov 2026 21:59:05 +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=XVBVGx+y Received: by smtp.kernel.org (Postfix) with ESMTPSA id 24EA91F000C4; Sat, 14 Nov 2026 21:59:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1794693545; bh=k9vh98/TSwkzAfZhr+Gb6u3wkrwUBOeVsDf24nVfYjs=; h=Date:To:From:Subject; b=XVBVGx+yoBwpPhf6qIxtVCMPKjJmE48WrOv+xHxqhYhQ+rJ7SnjvTmWWVN2Nh8NgN eATDFFyohh7HJ7qLg1XEGUEVtioyxSdwvABVHD5qY/nArB0q3kJ3pgYffw2fZ9icpQ XZMkzNjT0824n0GUzipNPVH3wsbDZw3MAAvqDeTk= Date: Sat, 14 Nov 2026 13:59:04 -0800 To: mm-commits@vger.kernel.org,kasong@tencent.com,akpm@linux-foundation.org From: Andrew Morton Subject: [to-be-updated] mm-mglru-extract-lruvec_populated_min_seq-helper.patch removed from -mm tree Message-Id: <20261114215905.24EA91F000C4@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 quilt patch titled Subject: mm/mglru: extract lruvec_populated_min_seq() helper has been removed from the -mm tree. Its filename was mm-mglru-extract-lruvec_populated_min_seq-helper.patch This patch was dropped because an updated version will be issued ------------------------------------------------------ From: Kairui Song Subject: mm/mglru: extract lruvec_populated_min_seq() helper Date: Sat, 14 Nov 2026 02:55:27 +0800 The search for the oldest populated generation of a type, previously embedded in try_to_inc_min_seq(), is extracted into the new lruvec_populated_min_seq() helper. It returns the oldest populated seq of a given type, bounded by the given max_seq so the search never goes beyond it. No functional change. Link: https://lore.kernel.org/20261113185541.70203-3-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 | 45 +++++++++++++++++++++++++++++---------------- 1 file changed, 29 insertions(+), 16 deletions(-) --- a/mm/vmscan.c~mm-mglru-extract-lruvec_populated_min_seq-helper +++ a/mm/vmscan.c @@ -3992,30 +3992,45 @@ done: return true; } +/* Similar to lruvec_evictable_size, return the oldest populated seq of the type */ +static unsigned long lruvec_populated_min_seq(struct lruvec *lruvec, int type, + unsigned long max_seq) +{ + int gen, zone; + unsigned long min_seq; + struct lru_gen_folio *lrugen = &lruvec->lrugen; + + lockdep_assert_held(&lruvec->lru_lock); + + min_seq = READ_ONCE(lrugen->min_seq[type]); + while (min_seq <= max_seq) { + gen = lru_gen_from_seq(min_seq); + for (zone = 0; zone < MAX_NR_ZONES; zone++) { + if (!list_empty(&lrugen->folios[gen][type][zone])) + return min_seq; + } + min_seq++; + } + + return max_seq; +} + static void try_to_inc_min_seq(struct lruvec *lruvec, int swappiness) { - int gen, type, zone; + int type; bool seq_inc_flag = false; struct lru_gen_folio *lrugen = &lruvec->lrugen; DEFINE_MIN_SEQ(lruvec); + unsigned long seq; VM_WARN_ON_ONCE(!seq_is_valid(lruvec)); - /* find the oldest populated generation */ + /* Requires at least MIN_NR_GENS gens for basic functionality */ + seq = lrugen->max_seq - MIN_NR_GENS; for_each_evictable_type(type, swappiness) { - while (min_seq[type] + MIN_NR_GENS <= lrugen->max_seq) { - gen = lru_gen_from_seq(min_seq[type]); - - for (zone = 0; zone < MAX_NR_ZONES; zone++) { - if (!list_empty(&lrugen->folios[gen][type][zone])) - goto next; - } - - min_seq[type]++; + min_seq[type] = lruvec_populated_min_seq(lruvec, type, seq + 1); + if (min_seq[type] > lrugen->min_seq[type]) seq_inc_flag = true; - } -next: - ; } /* @@ -4027,8 +4042,6 @@ next: /* see the comment on lru_gen_folio */ if (swappiness && swappiness <= MAX_SWAPPINESS) { - unsigned long seq = lrugen->max_seq - MIN_NR_GENS; - if (min_seq[LRU_GEN_ANON] > seq && min_seq[LRU_GEN_FILE] < seq) min_seq[LRU_GEN_ANON] = seq; else if (min_seq[LRU_GEN_FILE] > seq && min_seq[LRU_GEN_ANON] < seq) _ Patches currently in -mm which might be from kasong@tencent.com are 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