linux-kernel - Re: [PATCH v2 1/4] mm: Set folio swapbacked iff folios are dirty in try_to_unmap

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Message-ID: <21fa516b-8828-40c5-b5cb-d97cdf01f0f2@linux.alibaba.com>
Date: Tue, 14 Jan 2025 10:55:53 +0800
From: Baolin Wang <baolin.wang@...ux.alibaba.com>
To: Barry Song <21cnbao@...il.com>, akpm@...ux-foundation.org,
 linux-mm@...ck.org
Cc: chrisl@...nel.org, david@...hat.com, ioworker0@...il.com,
 kasong@...cent.com, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org, ryan.roberts@....com, v-songbaohua@...o.com,
 x86@...nel.org, linux-riscv@...ts.infradead.org, ying.huang@...el.com,
 zhengtangquan@...o.com, lorenzo.stoakes@...cle.com
Subject: Re: [PATCH v2 1/4] mm: Set folio swapbacked iff folios are dirty in
 try_to_unmap_one



On 2025/1/13 11:38, Barry Song wrote:
> From: Barry Song <v-songbaohua@...o.com>
> 
> The refcount may be temporarily or long-term increased, but this does
> not change the fundamental nature of the folio already being lazy-
> freed. Therefore, we only reset 'swapbacked' when we are certain the
> folio is dirty and not droppable.
> 
> Suggested-by: David Hildenbrand <david@...hat.com>
> Signed-off-by: Barry Song <v-songbaohua@...o.com>

LGTM. Feel free to add:
Reviewed-by: Baolin Wang <baolin.wang@...ux.alibaba.com>