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Re: [Qemu-devel] vhost broken?
From: |
Daniel P. Berrange |
Subject: |
Re: [Qemu-devel] vhost broken? |
Date: |
Thu, 5 Jan 2012 11:37:26 +0000 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Thu, Jan 05, 2012 at 01:16:22PM +0200, Avi Kivity wrote:
> On 01/05/2012 01:05 PM, Gerd Hoffmann wrote:
> > Hi,
> >
> > current master seems to corrupt guest memory, I get guest errors like
> > this one:
> >
> > swap_dup: Bad swap file entry 1999800080
> > BUG: Bad page map in process udevd pte:bec5f30054520100 pmd:1f6f4067
> > addr:00007fc464a02000 vm_flags:00100073 anon_vma:ffff88001f928ec0
> > mapping:(null) index:7fc464a02
> > Pid: 555, comm: udevd Not tainted 2.6.32-220.el6.x86_64 #1
> >
> > bisecting points to this commit:
> >
> > commit 04097f7c5957273c578f72b9bd603ba6b1d69e33
> > Author: Avi Kivity <address@hidden>
> > Date: Sun Dec 18 14:06:05 2011 +0200
> >
> > vhost: convert to MemoryListener API
> >
>
> Very likely. Michael, can you help?
>
> I don't have a vhost setup, can you share your command line?
All you need to do is take your existing -netdev command line,
and add in the parameter:
vhost=on
Libvirt does some extra stuff like passing down a pre-opened vhost
file descriptor, but you can ignore that for just testing the core
functionality.
Regards,
Daniel
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