Re: [Qemu-devel] [RFH] Qemu main thread is blocked in g_poll in windows guest

[Paolo Bonzini]

Il 15/10/2013 12:21, Xiexiangyou ha scritto:
> Hi all:
> 
> Windows2008 Guest run without pressure for long time. Sometimes, it
> stop and looks like hanging. But when I connect to it with VNC, It
> resume to run, but VM's time is delayed . When the vm is hanging, I
> check the main thread of QEMU. I find that the thread is blocked in
> g_poll function. it is waiting for a SIG, However, there is no SIG .
> 
> I tried the clock with "hpet" and "no hpet", but came out the same
> problem. Then I upgrade the glibc to newer, it didn't work too. I'm
> confused. Is the reason that VM in sleep state and doesn't emit the
> signal. I set the windows 's "power option", enable/disable the
> "allow the wake timers", I didn't work.
> 
> Is anybody have met the same problem before, or know the reason. Your
> reply will be very helpful.

This post is missing a few pieces of information:

* What version of QEMU is this?

* What is the command line?

* How do you know g_poll is waiting for a signal and not for a file
descriptor?

* What is the backtrace of the main thread?  What is the backtrace of
the VCPU thread?

etc.

Paolo