[libvirt] [PATCH] qemu: Fix shutdown regression

[Jiri Denemark]

On Tue, Sep 20, 2011 at 19:39:15 +0200, Jiri Denemark wrote:
> The commit that prevents disk corruption on domain shutdown
> (96fc4784177ecb70357518fa863442455e45ad0e) causes regression with QEMU
> 0.14.* and 0.15.* because of a regression bug in QEMU that was fixed
> only recently in QEMU git. With affected QEMU binaries, domains cannot
> be shutdown properly and stay in a paused state. This patch tries to
> avoid this by sending SIGKILL to 0.1[45].* QEMU processes. Though we
> wait a bit more between sending SIGTERM and SIGKILL to reduce the
> possibility of virtual disk corruption.

An alternative solution would be to break reboot on affected QEMUs instead of
trying to live with possible data corruption as if libvirt 0.9.[34] is used.
That is, virDomainReboot would report unsupported operation because current
emulator binary is not able to support it without causing possible data
corruption during shutdown.

Jirka