linux-kernel - Re: [PATCH v2] mm: shmem: fix getting incorrect lruvec when replacing a shmem folio

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Message-ID: <58681eb0-cf36-4aa2-906e-a1a8daa2b969@linux.alibaba.com>
Date: Fri, 14 Jun 2024 13:03:27 +0800
From: Baolin Wang <baolin.wang@...ux.alibaba.com>
To: Matthew Wilcox <willy@...radead.org>
Cc: akpm@...ux-foundation.org, hughd@...gle.com, mhocko@...nel.org,
 roman.gushchin@...ux.dev, shakeel.butt@...ux.dev, muchun.song@...ux.dev,
 hannes@...xchg.org, nphamcs@...il.com, yosryahmed@...gle.com,
 linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] mm: shmem: fix getting incorrect lruvec when replacing
 a shmem folio



On 2024/6/14 11:22, Matthew Wilcox wrote:
> On Fri, Jun 14, 2024 at 08:49:13AM +0800, Baolin Wang wrote:
>>    * Charge @new as a replacement folio for @old. @old will
>> - * be uncharged upon free. This is only used by the page cache
>> - * (in replace_page_cache_folio()).
>> + * be uncharged upon free. This is used by the page cache
>> + * and shmem (in replace_page_cache_folio() and
>> + * shmem_replace_folio()).
> 
> Please just delete this sentence.  Functions do not keep track of who
> their callers are.

Sure. This sentence seems less helpful. Will do in v3.