From: "Harry Yoo (Oracle)" <harry@kernel.org>
To: Qi Zheng <qi.zheng@linux.dev>
Cc: hannes@cmpxchg.org, hughd@google.com, mhocko@suse.com,
roman.gushchin@linux.dev, shakeel.butt@linux.dev,
muchun.song@linux.dev, david@kernel.org,
lorenzo.stoakes@oracle.com, ziy@nvidia.com, harry.yoo@oracle.com,
yosry.ahmed@linux.dev, imran.f.khan@oracle.com,
kamalesh.babulal@oracle.com, axelrasmussen@google.com,
yuanchu@google.com, weixugc@google.com,
chenridong@huaweicloud.com, mkoutny@suse.com,
akpm@linux-foundation.org, hamzamahfooz@linux.microsoft.com,
apais@linux.microsoft.com, lance.yang@linux.dev, bhe@redhat.com,
usamaarif642@gmail.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
Qi Zheng <zhengqi.arch@bytedance.com>
Subject: Re: [PATCH] fix: mm: vmscan: prepare for reparenting MGLRU folios
Date: Wed, 25 Mar 2026 09:28:06 +0900 [thread overview]
Message-ID: <acMsFsQOAIK-455b@hyeyoo> (raw)
In-Reply-To: <20260324114937.28569-1-qi.zheng@linux.dev>
On Tue, Mar 24, 2026 at 07:49:37PM +0800, Qi Zheng wrote:
> From: Qi Zheng <zhengqi.arch@bytedance.com>
>
> The lru_to_folio() returns the tail folio, and the lruvec_add_folio() adds
> folio to the head, so the tail page is colder. Since we always assume that
> the folios in child memcg (about to go offline) are always colder, we
> should use list_splice_tail_init() to reparent the child folios to the
> tail of the lru list of parent memcg.
>
> Reported-by: Harry Yoo <harry.yoo@oracle.com>
> Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
> ---
Reviewed-by: Harry Yoo <harry.yoo@oracle.com>
--
Cheers,
Harry / Hyeonggon
next prev parent reply other threads:[~2026-03-25 0:28 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-05 11:52 [PATCH v6 00/33] Eliminate Dying Memory Cgroup Qi Zheng
2026-03-05 11:52 ` [PATCH v6 01/33] mm: memcontrol: remove dead code of checking parent memory cgroup Qi Zheng
2026-03-05 11:52 ` [PATCH v6 02/33] mm: workingset: use folio_lruvec() in workingset_refault() Qi Zheng
2026-03-05 11:52 ` [PATCH v6 03/33] mm: rename unlock_page_lruvec_irq and its variants Qi Zheng
2026-03-05 11:52 ` [PATCH v6 04/33] mm: vmscan: prepare for the refactoring the move_folios_to_lru() Qi Zheng
2026-03-05 11:52 ` [PATCH v6 05/33] mm: vmscan: refactor move_folios_to_lru() Qi Zheng
2026-03-05 11:52 ` [PATCH v6 06/33] mm: memcontrol: allocate object cgroup for non-kmem case Qi Zheng
2026-03-05 11:52 ` [PATCH v6 07/33] mm: memcontrol: return root object cgroup for root memory cgroup Qi Zheng
2026-03-05 11:52 ` [PATCH v6 08/33] mm: memcontrol: prevent memory cgroup release in get_mem_cgroup_from_folio() Qi Zheng
2026-03-05 11:52 ` [PATCH v6 09/33] buffer: prevent memory cgroup release in folio_alloc_buffers() Qi Zheng
2026-03-05 11:52 ` [PATCH v6 10/33] writeback: prevent memory cgroup release in writeback module Qi Zheng
2026-03-05 11:52 ` [PATCH v6 11/33] mm: memcontrol: prevent memory cgroup release in count_memcg_folio_events() Qi Zheng
2026-03-05 11:52 ` [PATCH v6 12/33] mm: page_io: prevent memory cgroup release in page_io module Qi Zheng
2026-03-05 11:52 ` [PATCH v6 13/33] mm: migrate: prevent memory cgroup release in folio_migrate_mapping() Qi Zheng
2026-03-05 11:52 ` [PATCH v6 14/33] mm: mglru: prevent memory cgroup release in mglru Qi Zheng
2026-03-05 11:52 ` [PATCH v6 15/33] mm: memcontrol: prevent memory cgroup release in mem_cgroup_swap_full() Qi Zheng
2026-03-05 11:52 ` [PATCH v6 16/33] mm: workingset: prevent memory cgroup release in lru_gen_eviction() Qi Zheng
2026-03-05 11:52 ` [PATCH v6 17/33] mm: thp: prevent memory cgroup release in folio_split_queue_lock{_irqsave}() Qi Zheng
2026-03-05 11:52 ` [PATCH v6 18/33] mm: zswap: prevent memory cgroup release in zswap_compress() Qi Zheng
2026-03-05 11:52 ` [PATCH v6 19/33] mm: workingset: prevent lruvec release in workingset_refault() Qi Zheng
2026-03-05 11:52 ` [PATCH v6 20/33] mm: zswap: prevent lruvec release in zswap_folio_swapin() Qi Zheng
2026-03-05 11:52 ` [PATCH v6 21/33] mm: swap: prevent lruvec release in lru_gen_clear_refs() Qi Zheng
2026-03-05 11:52 ` [PATCH v6 22/33] mm: workingset: prevent lruvec release in workingset_activation() Qi Zheng
2026-03-05 11:52 ` [PATCH v6 23/33] mm: do not open-code lruvec lock Qi Zheng
2026-03-05 11:52 ` [PATCH v6 24/33] mm: memcontrol: prepare for reparenting LRU pages for " Qi Zheng
2026-03-05 11:52 ` [PATCH v6 25/33] mm: vmscan: prepare for reparenting traditional LRU folios Qi Zheng
2026-03-05 11:52 ` [PATCH v6 26/33] mm: vmscan: prepare for reparenting MGLRU folios Qi Zheng
2026-03-23 13:29 ` Harry Yoo (Oracle)
2026-03-24 2:46 ` Qi Zheng
2026-03-24 11:49 ` [PATCH] fix: " Qi Zheng
2026-03-25 0:28 ` Harry Yoo (Oracle) [this message]
2026-03-05 11:52 ` [PATCH v6 27/33] mm: memcontrol: refactor memcg_reparent_objcgs() Qi Zheng
2026-03-05 11:52 ` [PATCH v6 28/33] mm: workingset: use lruvec_lru_size() to get the number of lru pages Qi Zheng
2026-03-05 11:52 ` [PATCH v6 29/33] mm: memcontrol: refactor mod_memcg_state() and mod_memcg_lruvec_state() Qi Zheng
2026-03-05 11:52 ` [PATCH v6 30/33] mm: memcontrol: prepare for reparenting non-hierarchical stats Qi Zheng
2026-03-13 16:22 ` Michal Koutný
2026-03-16 3:47 ` Qi Zheng
2026-03-23 7:53 ` Harry Yoo (Oracle)
2026-03-23 9:47 ` Qi Zheng
2026-03-23 12:25 ` Harry Yoo (Oracle)
2026-03-24 2:54 ` Qi Zheng
2026-03-24 4:05 ` Harry Yoo (Oracle)
2026-03-24 4:25 ` Qi Zheng
2026-03-24 4:40 ` Harry Yoo (Oracle)
2026-03-05 11:52 ` [PATCH v6 31/33] mm: memcontrol: convert objcg to be per-memcg per-node type Qi Zheng
2026-03-06 20:29 ` Usama Arif
2026-03-07 8:51 ` Qi Zheng
2026-03-07 11:08 ` Usama Arif
2026-03-09 2:59 ` Qi Zheng
2026-03-09 11:29 ` [PATCH] fix: " Qi Zheng
2026-03-09 11:33 ` Usama Arif
2026-03-09 11:43 ` Qi Zheng
2026-03-05 11:52 ` [PATCH v6 32/33] mm: memcontrol: eliminate the problem of dying memory cgroup for LRU folios Qi Zheng
2026-03-05 11:52 ` [PATCH v6 33/33] mm: lru: add VM_WARN_ON_ONCE_FOLIO to lru maintenance helpers Qi Zheng
2026-03-06 0:51 ` [PATCH v6 00/33] Eliminate Dying Memory Cgroup Andrew Morton
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