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Date: Fri, 27 Jun 2014 14:50:27 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] [old BUG]: -watchdog-action pause hangs QEMU
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To: Luiz Capitulino <lcapitulino@redhat.com>
Cc: rjones@redhat.com, qemu-devel <qemu-devel@nongnu.org>

Il 27/06/2014 14:45, Luiz Capitulino ha scritto:
> On Thu, 26 Jun 2014 23:24:09 +0200
> Paolo Bonzini <pbonzini@redhat.com> wrote:
>
>> Il 26/06/2014 22:19, Luiz Capitulino ha scritto:
>>> Here goes a gdb backtrace:
>>>
>>> #0  0x00007f298ce31759 in syscall () from /lib64/libc.so.6
>>> #1  0x00007f29939b0b56 in futex_wait (ev=0x7f2994548f18, val=4294967295)
>>>     at /home/lcapitulino/work/src/upstream/qmp-unstable/util/qemu-thread-posix.c:304
>>> #2  0x00007f29939b0c68 in qemu_event_wait (ev=0x7f2994548f18)
>>>     at /home/lcapitulino/work/src/upstream/qmp-unstable/util/qemu-thread-posix.c:400
>>> #3  0x00007f299392a066 in qemu_clock_enable (type=QEMU_CLOCK_VIRTUAL, enabled=false)
>>>     at /home/lcapitulino/work/src/upstream/qmp-unstable/qemu-timer.c:171


/* Disabling the clock will wait for related timerlists to stop
  * executing qemu_run_timers.  Thus, this functions should not
  * be used from the callback of a timer that is based on @clock.
  * Doing so would cause a deadlock.
  */

It does indeed.  I'll post a fix during hard freeze.

Paolo