Re: qemu_mutex deadlock with -smp 2

[Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>]

Darrick J. Wong wrote:
> Hi,
>
> I'm attempting to run a KVM instance with 2 CPUs configured.  The VM
> appears to get most of the way through booting Ubuntu and then kvm locks
> up.  At that point there's nothing printed on stdout from the kvm
> process and the monitor doesn't respond either.  The host's kernel is
> 2.6.24-rc7 and the kvm binary is built from git.
>
> Here's the command line I use:
>
>   
[...]

> It appears that we're deadlocked on qemu_mutex; it would also appear
> that disabling the network interface buys me a few more seconds until
> the lockup occurs.  Most of the time it is the case that post_kvm_run()
> locked qemu_mutex and then kvm_eat_signal() tries to lock it as well.
>   

Are you using qcow?  If so, this may be the recently-committed smp aio 
deadlock fix.  See 6bcdef5c1157bd7b526491252d20f8007ff2e9dc.  Please try 
a fresh qemu-userspace.git.

-- 
error compiling committee.c: too many arguments to function


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