linux-kernel - Re: [PATCH 0/3] mm: introduce snapshot

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Message-ID: <4b56c056-ad98-471f-8b5f-b7080d025b1a@redhat.com>
Date: Wed, 2 Jul 2025 13:39:25 -0400
From: Luiz Capitulino <luizcap@...hat.com>
To: Shivank Garg <shivankg@....com>, david@...hat.com, willy@...radead.org
Cc: akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
 linux-mm@...ck.org, lcapitulino@...il.com
Subject: Re: [PATCH 0/3] mm: introduce snapshot_page()

On 2025-07-02 02:40, Shivank Garg wrote:
> 
> 
> On 6/26/2025 11:46 PM, Luiz Capitulino wrote:
>> Hi,
>>
>> This series introduces snapshot_page(), a helper function that can be used
>> to create a snapshot of a struct page and its associated struct folio.
>>
>> This function is intended to help callers with a consistent view of a
>> a folio while reducing the chance of encountering partially updated or
>> inconsistent state, such as during folio splitting which could lead to
>> crashes and BUG_ON()s being triggered.
> 
> We could consider adding a Reported-by: tag and a link to the syzbot report.
> 
> I believe this is the relevant one:
> https://lore.kernel.org/all/67812fbd.050a0220.d0267.0030.GAE@google.com

I'll add it, thanks for the review.