linux-kernel - Re: [PATCH v4 4/4] mm: thp: reparent the split queue during memcg offline

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Message-ID: <F5C96305-4C4C-4718-8E7E-D2549B60B172@nvidia.com>
Date: Fri, 03 Oct 2025 12:58:13 -0400
From: Zi Yan <ziy@...dia.com>
To: Qi Zheng <qi.zheng@...ux.dev>
Cc: hannes@...xchg.org, hughd@...gle.com, mhocko@...e.com,
 roman.gushchin@...ux.dev, shakeel.butt@...ux.dev, muchun.song@...ux.dev,
 david@...hat.com, lorenzo.stoakes@...cle.com, harry.yoo@...cle.com,
 baolin.wang@...ux.alibaba.com, Liam.Howlett@...cle.com, npache@...hat.com,
 ryan.roberts@....com, dev.jain@....com, baohua@...nel.org,
 lance.yang@...ux.dev, akpm@...ux-foundation.org, linux-mm@...ck.org,
 linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
 Qi Zheng <zhengqi.arch@...edance.com>
Subject: Re: [PATCH v4 4/4] mm: thp: reparent the split queue during memcg
 offline

On 3 Oct 2025, at 12:53, Qi Zheng wrote:

> From: Qi Zheng <zhengqi.arch@...edance.com>
>
> Similar to list_lru, the split queue is relatively independent and does
> not need to be reparented along with objcg and LRU folios (holding
> objcg lock and lru lock). So let's apply the similar mechanism as list_lru
> to reparent the split queue separately when memcg is offine.
>
> This is also a preparation for reparenting LRU folios.
>
> Signed-off-by: Qi Zheng <zhengqi.arch@...edance.com>
> ---
>  include/linux/huge_mm.h |  4 +++
>  mm/huge_memory.c        | 54 +++++++++++++++++++++++++++++++++++++++++
>  mm/memcontrol.c         |  1 +
>  3 files changed, 59 insertions(+)
>

Acked-by: Zi Yan <ziy@...dia.com>

Best Regards,
Yan, Zi