Re: [qemu-mainline test] 31329: regressions - FAIL

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Mon, Nov 03, 2014 at 02:48:25PM +0000, Stefano Stabellini wrote:
> CC'ing Konrad and David as this is most probably a problem with Linux.

Yeah. And David posted a patch for this - but it hasn't been reposted
(it needs a compile fix).
> 
> On Mon, 3 Nov 2014, Ian Jackson wrote:
> > Ian Campbell writes ("Re: [Xen-devel] [qemu-mainline test] 31329: regressions - FAIL"):
> > > Looks like this test hasn't succeeded since 6 October (flight 30603).
> > > 
> > > Looking over the various failures since then the 
> > >  test-amd64-i386-pair   17 guest-migrate/src_host/dst_host fail REGR. vs. 30603
> > > one has been consistently failing.
> > 
> > This is the longstanding mptsas swiotlb bug.
> > 
> > In this particular test case, the migration test source host reports
> > lots of swiotlb full messages, first from bnx2 and then from mptsas.
> > 
> > The first such message is from bnx2 in the middle of guest boot
> > (32-bit PV Debian guest).  The guest is booting on the source host,
> > and the guest's filesystem is provided via nbd.  The source host has
> > the nbd client and the destination host the nbd server.
> > 
> > I have added `swiotlb=26422' to the host property `install-append
> > wheezy' for these two machines.  Hopefully this will either work
> > around the problem, or at least provide more information.
>