Hi,

I have a linux guest running in qemu-kvm which freezes temporarily whenever the 
host clock is advanced.  The freezing is ~1s/month of advance.  So advancing 
the host clock by 1 year the guest will be frozen for about 12 seconds.  There 
appears to be no impact when the clock is wound back however.

The guest is using kvm-clock source if that matters.
#uname -a
Linux NO-HOSTNAME 2.6.32.59.cge #1 SMP PREEMPT Tue Jan 28 14:38:11 PST 2014 
x86_64 GNU/Linux

Also during the freeze it also appears that some signals may be lost.  For 
example, the acpid failed to respond to the system_powerdown command in the 
qemu shell.

I know this is an unusual scenario but one for which I would like an 
explanation.
Has anyone else experienced this behaviour or can explain what may be going on 
here?

James
                                          

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