From: Lorenzo Stoakes <ljs@kernel.org>
To: "David Hildenbrand (Arm)" <david@kernel.org>
Cc: ZhengYuan Huang <gality369@gmail.com>,
akpm@linux-foundation.org, Liam.Howlett@oracle.com,
vbabka@kernel.org, rppt@kernel.org, surenb@google.com,
mhocko@suse.com, willy@infradead.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, baijiaju1990@gmail.com,
r33s3n6@gmail.com, zzzccc427@gmail.com
Subject: Re: [PATCH] mm: prepare anon_vma before swapin rmap
Date: Sat, 18 Apr 2026 10:35:36 +0100 [thread overview]
Message-ID: <aeNP7mtx878gynXS@lucifer> (raw)
In-Reply-To: <fb80d953-93de-4ce3-80c6-15cd53dd956f@kernel.org>
On Fri, Apr 17, 2026 at 01:57:59PM +0200, David Hildenbrand (Arm) wrote:
> Maybe there was a scenario where we could have lost vma->anon_vma during
> a merge, resulting in a swapped page in an anon_vma.
Unless there's a bug (and correct me if I'm misinterpreting), VMA merge requires
vma->anon_vma to either be equal for merged adjacent VMAs, or one or the other
VMA to have NULL vma->anon_vma, in which case we set vma->anon_vma in the merged
VMA.
Thanks, Lorenzo
prev parent reply other threads:[~2026-04-18 9:35 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-17 1:16 ZhengYuan Huang
2026-04-17 4:03 ` Matthew Wilcox
2026-04-18 9:38 ` Lorenzo Stoakes
2026-04-17 10:53 ` David Hildenbrand (Arm)
2026-04-17 11:57 ` David Hildenbrand (Arm)
2026-04-17 13:03 ` Matthew Wilcox
2026-04-17 13:36 ` Vlastimil Babka (SUSE)
2026-04-17 15:09 ` Matthew Wilcox
2026-04-18 9:35 ` Lorenzo Stoakes [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=aeNP7mtx878gynXS@lucifer \
--to=ljs@kernel.org \
--cc=Liam.Howlett@oracle.com \
--cc=akpm@linux-foundation.org \
--cc=baijiaju1990@gmail.com \
--cc=david@kernel.org \
--cc=gality369@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mhocko@suse.com \
--cc=r33s3n6@gmail.com \
--cc=rppt@kernel.org \
--cc=surenb@google.com \
--cc=vbabka@kernel.org \
--cc=willy@infradead.org \
--cc=zzzccc427@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox