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

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Message-ID: <488a0640-9096-41d0-9a5f-34ba5f2a279c@redhat.com>
Date: Mon, 6 Oct 2025 08:46:35 +0200
From: David Hildenbrand <david@...hat.com>
To: Qi Zheng <qi.zheng@...ux.dev>, hannes@...xchg.org, hughd@...gle.com,
 mhocko@...e.com, roman.gushchin@...ux.dev, shakeel.butt@...ux.dev,
 muchun.song@...ux.dev, lorenzo.stoakes@...cle.com, ziy@...dia.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
Cc: 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 03.10.25 18:53, 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.
> 

Much cleaner IMHO

Acked-by: David Hildenbrand <david@...hat.com>

-- 
Cheers

David / dhildenb