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

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Message-ID: <2af92b56-d344-4b22-8eba-872418efbe3b@amd.com>
Date: Wed, 2 Jul 2025 12:10:54 +0530
From: Shivank Garg <shivankg@....com>
To: Luiz Capitulino <luizcap@...hat.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 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