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qemu: make sure capability probing process can start

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When daemon is killed right in the middle of probing a qemu binary for
its capabilities, the qemu process is left running.  Next time the
daemon is starting, it cannot start the probing qemu process because the
one that's already running does have the pidfile flock()'d.

Reported-by: Wang Yufei <james.wangyufei@huawei.com>

Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
(cherry picked from commit 0ed1b55b20300e0ea53925349d918935c2114bf2)
This commit is contained in:
Martin Kletzander 2014-10-09 08:18:33 +02:00 committed by Cole Robinson
parent 595a1c8836
commit 963d0bb5e6
1 changed files with 2 additions and 0 deletions
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src/qemu/qemu_capabilities.c
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@ -3241,6 +3241,8 @@ virQEMUCapsInitQMP(virQEMUCapsPtr qemuCaps,
config.data.nix.path = monpath;
config.data.nix.listen = false;
virPidFileForceCleanupPath(pidfile);
VIR_DEBUG("Try to get caps via QMP qemuCaps=%p", qemuCaps);
/*