From: Konstantin Khorenko <khorenko@virtuozzo.com>
To: andrey.zhadchenko@virtuozzo.com, "Denis V. Lunev" <den@openvz.org>
Cc: devel@openvz.org
Subject: Re: [Devel] [PATCH hci-8.1 v3 0/5] dm-qcow2: fix merges not stopping the users of the images they change
Date: Wed, 04 Nov 2026 19:30:07 +0100 [thread overview]
Message-ID: <179381700712.2735802.13009025695192662868.b4-ty@b4> (raw)
In-Reply-To: <20261104180105.1807820-1-den@openvz.org>
On Wed, 04 Nov 2026 19:01:00 +0100, Denis V. Lunev wrote:
> dm-qcow2: fix merges not stopping the users of the images they change
>
> Checking dm-qcow2 for the same problem showed that a merge does not
> stop everything using the images it changes (VSTOR-153049,
> VSTOR-153050):
>
> - a backward merge of an inner image starts without pausing anything,
> while reads enter through the top image. A read reaching the inner
> image as the merge starts oopses on a NULL qio->ext (patch 2);
>
> [...]
Applied to branch-rh10-6.12.0-211.52.1.22.x.vz10-ovz, will be released in rh10-6.12.0-211.52.1.22.18.vz10, thanks!
[1/5] dm-qcow2: fix a failed refcount table relocation leaking md pages
https://bitbucket.org/virtuozzocore/vzkernel.vzs/commits/beada5e3721a
[2/5] dm-qcow2: fix backward merge of an inner image racing its reads
https://bitbucket.org/virtuozzocore/vzkernel.vzs/commits/917b0f940acc
[3/5] dm-qcow2: fix SEEK_HOLE/SEEK_DATA using an image freed by a merge
https://bitbucket.org/virtuozzocore/vzkernel.vzs/commits/5400a597e4d6
[4/5] dm-qcow2: fix SEEK_HOLE/SEEK_DATA hanging after a failed metadata read
https://bitbucket.org/virtuozzocore/vzkernel.vzs/commits/334bce6208ed
[5/5] dm-qcow2: fix a refcount table relocation failing on a valid image
https://bitbucket.org/virtuozzocore/vzkernel.vzs/commits/6f2dd6d659e1
--
Konstantin Khorenko,
Virtuozzo Linux Kernel Team
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prev parent reply other threads:[~2026-11-04 18:31 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-04 18:01 Denis V. Lunev
2026-11-04 18:01 ` [Devel] [PATCH hci-8.1 v3 1/5] dm-qcow2: fix a failed refcount table relocation leaking md pages Denis V. Lunev
2026-11-04 18:52 ` no-reply
2026-11-04 18:01 ` [Devel] [PATCH hci-8.1 v3 2/5] dm-qcow2: fix backward merge of an inner image racing its reads Denis V. Lunev
2026-11-04 18:52 ` no-reply
2026-11-04 18:01 ` [Devel] [PATCH hci-8.1 v3 3/5] dm-qcow2: fix SEEK_HOLE/SEEK_DATA using an image freed by a merge Denis V. Lunev
2026-11-04 18:54 ` no-reply
2026-11-04 18:01 ` [Devel] [PATCH hci-8.1 v3 4/5] dm-qcow2: fix SEEK_HOLE/SEEK_DATA hanging after a failed metadata read Denis V. Lunev
2026-11-04 18:55 ` no-reply
2026-11-04 18:01 ` [Devel] [PATCH hci-8.1 v3 5/5] dm-qcow2: fix a refcount table relocation failing on a valid image Denis V. Lunev
2026-11-04 18:55 ` no-reply
2026-11-04 18:30 ` Konstantin Khorenko [this message]
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