linux-kernel - Re: [PATCHv2 1/2] mm/memory: Do not populate page table entries beyond i

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Message-Id: <20251023143624.1732f958020254baff0a4bee@linux-foundation.org>
Date: Thu, 23 Oct 2025 14:36:24 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: David Hildenbrand <david@...hat.com>
Cc: Kiryl Shutsemau <kirill@...temov.name>, Hugh Dickins <hughd@...gle.com>,
 Matthew Wilcox <willy@...radead.org>, Alexander Viro
 <viro@...iv.linux.org.uk>, Christian Brauner <brauner@...nel.org>, Lorenzo
 Stoakes <lorenzo.stoakes@...cle.com>, "Liam R. Howlett"
 <Liam.Howlett@...cle.com>, Vlastimil Babka <vbabka@...e.cz>, Mike Rapoport
 <rppt@...nel.org>, Suren Baghdasaryan <surenb@...gle.com>, Michal Hocko
 <mhocko@...e.com>, Rik van Riel <riel@...riel.com>, Harry Yoo
 <harry.yoo@...cle.com>, Johannes Weiner <hannes@...xchg.org>, Shakeel Butt
 <shakeel.butt@...ux.dev>, Baolin Wang <baolin.wang@...ux.alibaba.com>,
 "Darrick J. Wong" <djwong@...nel.org>, Dave Chinner <david@...morbit.com>,
 linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
 linux-kernel@...r.kernel.org, Kiryl Shutsemau <kas@...nel.org>
Subject: Re: [PATCHv2 1/2] mm/memory: Do not populate page table entries
 beyond i_size

On Thu, 23 Oct 2025 22:54:49 +0200 David Hildenbrand <david@...hat.com> wrote:

> >> Fixes: 19773df031bc ("mm/fault: try to map the entire file folio in finish_fault()")
> > 
> > Sep 28 2025
> > 
> >> Fixes: 357b92761d94 ("mm/filemap: map entire large folio faultaround")
> > 
> > Sep 28 2025
> > 
> >> Fixes: 800d8c63b2e9 ("shmem: add huge pages support")
> > 
> > Jul 26 2016
> > 
> > eek, what's this one doing here?  Are we asking -stable maintainers
> > to backport this patch into nine years worth of kernels?
> > 
> > I'll remove this Fixes: line for now...
> 
> Ehm, why?

Because the Sep 28 2025 Fixes: totally fooled me and because this
doesn't apply to 6.17, let alone to 6.ancient.

> It sure is a fix for that. We can indicate to which stable 
> versions we want to have ti backported.
> 
> And yes, it might be all stable kernels.

No probs, thanks for clarifying.  I'll restore the

	Fixes: 800d8c63b2e9 ("shmem: add huge pages support")
	Cc; <stable@...r.kernel.org>

and shall let others sort out the backporting issues.