Re: [Qemu-devel] segfault in aio_bh_poll async.c:80 WAS: Re: kvm process disappears

[Stefan Priebe]

Am 23.05.2013 12:09, schrieb Paolo Bonzini:
> Il 22/05/2013 14:24, Stefan Priebe - Profihost AG ha scritto:
> > Am 22.05.2013 um 10:41 schrieb Paolo Bonzini <address@hidden>:
> >
> > > Il 22/05/2013 08:26, Stefan Priebe - Profihost AG ha scritto:
> > > > > Hi,
> > > > >
> > > > > as i can't reproduce no ;-( i just saw the kernel segfault message and
> > > > > used addr2line and a qemu dbg package to get the code line.
> > > >
> > > > I've now seen this again for two or three times. It always happens
> > > > when we do an fstrim inside the guest.
> > >
> > >
> > > > And I've seen this first since josh async rbd patch.
> > >
> > > This one?
> > >
> > > commit dc7588c1eb3008bda53dde1d6b890cd299758155
> >
> > Yes. But i'm not sure whether this is coincendence.
>
> Ok.
>
> > >   Do you see it even with "-drive discard=off"?
> >
> > I use discard / trim for thin provisioning and need it. This is a
> > production system so I can't test without it.
> >
> > I use scsi virtio with discard_granularity=512
>
> Note that 1.5.0 won't need this anymore, but it will need "-drive
> discard=on".  Any chance you can try to reproduce it in a different
> environment?

OK i'll try to update to 1.5.0.

Stefan