From: Kairui Song via B4 Relay <devnull+kasong.tencent.com@kernel.org>
To: linux-mm@kvack.org, "Liam R. Howlett" <liam@infradead.org>,
SJ Park <sj@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Muchun Song <muchun.song@linux.dev>,
Qi Zheng <qi.zheng@linux.dev>,
Ying Huang <ying.huang@linux.alibaba.com>,
Chris Li <chrisl@kernel.org>, Baoquan He <baoquan.he@linux.dev>,
Nico Pache <nico.pache@linux.dev>,
Usama Arif <usama.arif@linux.dev>,
Michal Hocko <mhocko@kernel.org>,
Roman Gushchin <roman.gushchin@linux.dev>,
Shakeel Butt <shakeel.butt@linux.dev>,
David Hildenbrand <david@kernel.org>,
Lorenzo Stoakes <ljs@kernel.org>, Barry Song <baohua@kernel.org>,
Axel Rasmussen <axelrasmussen@google.com>,
Yuanchu Xie <yuanchu@google.com>, Wei Xu <weixugc@google.com>,
Vlastimil Babka <vbabka@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Kemeng Shi <shikemeng@huaweicloud.com>,
Nhat Pham <nphamcs@gmail.com>,
Youngjun Park <youngjun.park@lge.com>, Zi Yan <ziy@nvidia.com>,
Gregory Price <gourry@gourry.net>,
"Matthew Wilcox (Oracle)" <willy@infradead.org>,
Baolin Wang <baolin.wang@linux.alibaba.com>,
Ryan Roberts <ryan.roberts@arm.com>, Dev Jain <dev.jain@arm.com>,
Lance Yang <lance.yang@linux.dev>,
Hugh Dickins <hughd@google.com>,
David Rientjes <rientjes@google.com>,
Yu Zhao <yuzhao@google.com>, Vernon Yang <vernon2gm@gmail.com>,
Zicheng Wang <wangzicheng@honor.com>,
Chen Ridong <chenridong@xiaomi.com>,
Tal Zussman <tz2294@columbia.edu>,
Kairui Song <ryncsn@gmail.com>,
Xiang Liu <liuxiang.277@bytedance.com>,
Ehab Ababneh <ehab.ababneh@intel.com>,
zhaozhengzhuo <zhaozhengzhuo@uniontech.com>,
Lian Wang <lianux.mm@gmail.com>,
Kunwu Chan <kunwu.chan@gmail.com>,
linux-kernel@vger.kernel.org, cgroups@vger.kernel.org,
damon@lists.linux.dev, Kairui Song <kasong@tencent.com>
Subject: [PATCH v4 09/17] mm/damon: convert to LRU refs based operations for MGLRU
Date: Fri, 16 Oct 2026 02:15:58 +0800 [thread overview]
Message-ID: <20261016-mglru-fg-v4-9-2106750c0bfa@tencent.com> (raw)
In-Reply-To: <20261016-mglru-fg-v4-0-2106750c0bfa@tencent.com>
From: Kairui Song <kasong@tencent.com>
damon_pa_pageout() cleared PG_referenced directly, which under MGLRU
may corrupts the folio's refs count in later commits. That flag is now
bit 0 of the count (LRU_REFS_FLAGS).
Reset the count instead under MGLRU.
Tested-by: zhaozhengzhuo <zhaozhengzhuo@uniontech.com>
Signed-off-by: Kairui Song <kasong@tencent.com>
---
mm/damon/paddr.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index 2cfdc356b415..6412ff2396b3 100644
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
@@ -279,7 +279,8 @@ static unsigned long damon_pa_pageout(struct damon_region *r,
else
*sz_filter_passed += folio_size(folio) / addr_unit;
- folio_clear_referenced(folio);
+ /* The regions is cold, better drop the hotness info */
+ folio_clear_lru_refs(folio);
folio_test_clear_young(folio);
if (!folio_isolate_lru(folio))
goto put_folio;
--
2.56.0
next prev parent reply other threads:[~2026-10-15 18:15 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-15 18:15 [PATCH v4 00/17] mm/mglru: frequency guided promotion (MGLRU-FG) and flag cleanup Kairui Song via B4 Relay
2026-10-15 18:15 ` [PATCH v4 01/17] mm/memcontrol: allow update of LRU statistic without holding LRU lock Kairui Song via B4 Relay
2026-10-15 18:15 ` [PATCH v4 02/17] mm/mglru: make generation page counters atomic Kairui Song via B4 Relay
2026-10-15 18:15 ` [PATCH v4 03/17] mm/memcg: add folio-based lruvec live helper Kairui Song via B4 Relay
2026-10-15 19:11 ` Harry Yoo
2026-10-16 6:15 ` Kairui Song
2026-10-16 7:39 ` Muchun Song
2026-10-16 7:54 ` Kairui Song
2026-10-16 9:09 ` Muchun Song
2026-10-15 18:15 ` [PATCH v4 04/17] mm/mglru: frequency guided workingset promotion (MGLRU-FG) Kairui Song via B4 Relay
2026-10-15 18:15 ` [PATCH v4 05/17] mm/mglru: make folio lru referenced times count a generic API Kairui Song via B4 Relay
2026-10-15 18:15 ` [PATCH v4 06/17] mm/mglru: move add/del LRU size accounting out of lru_gen_update_size() Kairui Song via B4 Relay
2026-10-15 18:15 ` [PATCH v4 07/17] mm/mglru, gup: mark folios referenced via a fast helper Kairui Song via B4 Relay
2026-10-15 18:15 ` [PATCH v4 08/17] mm/mglru, smaps: convert to LRU refs based operations for MGLRU Kairui Song via B4 Relay
2026-10-15 18:15 ` Kairui Song via B4 Relay [this message]
2026-10-15 18:15 ` [PATCH v4 10/17] mm/khugepaged: " Kairui Song via B4 Relay
2026-10-15 18:16 ` [PATCH v4 11/17] mm/madvise: adapt for " Kairui Song via B4 Relay
2026-10-15 18:16 ` [PATCH v4 12/17] mm/huge_memory: mark folio as accessed more accurately on split Kairui Song via B4 Relay
2026-10-15 18:16 ` [PATCH v4 13/17] mm/mglru: folio LRU refs based active/inactive number accounting Kairui Song via B4 Relay
2026-10-15 18:16 ` [PATCH v4 14/17] mm/mglru: reparent folios from all generations Kairui Song via B4 Relay
2026-10-15 18:16 ` [PATCH v4 15/17] mm/mglru: make folio_inc_lru_refs lruvec lockless Kairui Song via B4 Relay
2026-10-15 18:16 ` [PATCH v4 16/17] mm/mglru: make folio_test_workingset() work based on folio LRU refs Kairui Song via B4 Relay
2026-10-15 18:16 ` [PATCH v4 17/17] Documentation/mm: multi-gen LRU: update for frequency guided promotion Kairui Song via B4 Relay
2026-10-16 8:42 ` [PATCH v4 00/17] mm/mglru: frequency guided promotion (MGLRU-FG) and flag cleanup Barry Song (Xiaomi)
2026-10-16 11:43 ` Kairui Song
2026-10-16 12:11 ` Kairui Song
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