linux-kernel - Re: [PATCHv2] mm: migrate LRU_REFS_MASK bits in folio_migrate

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Message-ID: <4a1f6d36-a720-4259-92c4-4d1f9b90cc25@redhat.com>
Date: Thu, 26 Sep 2024 10:27:31 +0200
From: David Hildenbrand <david@...hat.com>
To: "zhaoyang.huang" <zhaoyang.huang@...soc.com>,
 Andrew Morton <akpm@...ux-foundation.org>,
 Matthew Wilcox <willy@...radead.org>, Yu Zhao <yuzhao@...gle.com>,
 linux-mm@...ck.org, linux-kernel@...r.kernel.org,
 Zhaoyang Huang <huangzhaoyang@...il.com>, steve.kang@...soc.com
Subject: Re: [PATCHv2] mm: migrate LRU_REFS_MASK bits in folio_migrate_flags

On 26.09.24 07:06, zhaoyang.huang wrote:
> From: Zhaoyang Huang <zhaoyang.huang@...soc.com>
> 
> Bits of LRU_REFS_MASK are not inherited during migration which lead to
> new folio start from tier0 when MGLRU enabled. Try to bring as much bits
> of folio->flags as possible since compaction and alloc_contig_range
> which introduce migration do happen at times.
> 
> Suggested-by: Yu Zhao <yuzhao@...gle.com>
> Signed-off-by: Zhaoyang Huang <zhaoyang.huang@...soc.com>
> ---
> v2: modification as Yu Zhao suggested

Looks reasonable to me

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

-- 
Cheers,

David / dhildenb