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

[Stefan Priebe - Profihost AG]

Am 22.05.2013 um 10:41 schrieb Paolo Bonzini <pbonzini at redhat.com>:

> 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.

> 
>  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

Stefan

> Paolo