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Re: [Qemu-devel] Fwd: qemu drive mirror assert fault
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] Fwd: qemu drive mirror assert fault |
Date: |
Tue, 05 May 2015 12:13:24 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 |
On 05/05/2015 09:36, Fam Zheng wrote:
> Since the gdb output is suggesting 1.5.3, it's worth to trying 2.3 which has
> this:
>
> commit c4237dfa635900e4d1cdc6038d5efe3507f45f0c
> Author: Vladimir Sementsov-Ogievskiy <address@hidden>
> Date: Thu Nov 27 12:40:46 2014 +0300
>
> block: fix spoiling all dirty bitmaps by mirror and migration
>
> Mirror and migration use dirty bitmaps for their purposes, and since
> commit [block: per caller dirty bitmap] they use their own bitmaps,
> not
> the global one. But they use old functions bdrv_set_dirty and
> bdrv_reset_dirty, which change all dirty bitmaps.
>
> Named dirty bitmaps series by Fam and Snow are affected: mirroring and
> migration will spoil all (not related to this mirroring or migration)
> named dirty bitmaps.
>
> This patch fixes this by adding bdrv_set_dirty_bitmap and
> bdrv_reset_dirty_bitmap, which change concrete bitmap. Also, to
> prevent
> such mistakes in future, old functions bdrv_(set,reset)_dirty are made
> static, for internal block usage.
>
> Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
> CC: John Snow <address@hidden>
> CC: Fam Zheng <address@hidden>
> CC: Denis V. Lunev <address@hidden>
> CC: Stefan Hajnoczi <address@hidden>
> CC: Kevin Wolf <address@hidden>
> Reviewed-by: John Snow <address@hidden>
> Reviewed-by: Fam Zheng <address@hidden>
> Message-id: address@hidden
> Signed-off-by: Max Reitz <address@hidden>
I don't think this commit is relevant. The bug is caused by
bdrv_co_discard clearing the bitmap (which is not supported during
iteration, and is caught by the assertion). That bdrv_reset_dirty is
not removed by the commit you pointed out.
Paolo
- Re: [Qemu-devel] Fwd: qemu drive mirror assert fault, Fam Zheng, 2015/05/05
- Re: [Qemu-devel] Fwd: qemu drive mirror assert fault,
Paolo Bonzini <=
- Re: [Qemu-devel] Fwd: qemu drive mirror assert fault, Fam Zheng, 2015/05/05
- Re: [Qemu-devel] Fwd: qemu drive mirror assert fault, Kevin Wolf, 2015/05/05
- Re: [Qemu-devel] Fwd: qemu drive mirror assert fault, Paolo Bonzini, 2015/05/05
- Re: [Qemu-devel] Fwd: qemu drive mirror assert fault, Paolo Bonzini, 2015/05/05
- Re: [Qemu-devel] Fwd: qemu drive mirror assert fault, Kevin Wolf, 2015/05/05
- Re: [Qemu-devel] Fwd: qemu drive mirror assert fault, Paolo Bonzini, 2015/05/05
- Re: [Qemu-devel] Fwd: qemu drive mirror assert fault, Kevin Wolf, 2015/05/05
- Re: [Qemu-devel] Fwd: qemu drive mirror assert fault, Fam Zheng, 2015/05/05