Re: [Xen-ia64-devel] RE: [PATCH 0/5] fix fpswa and related issues.

[Alex Williamson <alex.williamson@xxxxxx>]

On Tue, 2008-12-09 at 21:23 -0700, Alex Williamson wrote:
> On Wed, 2008-12-10 at 10:51 +0800, Zhang, Xiantao wrote: 
> > > I've been testing this for a few hours today (over 25k iterations)
> > and
> > > it seems to fix the problem for me.  Thanks!
> > 
> > Hi, Alex
> >         Have you verified vmx domain as well ? 
> 
> Good point, no I was just testing in dom0.

Adding in Isaku's last patch and testing on an HVM domain, it doesn't
take long to hit problems.  4-way/4G HVM guest running 4 instances of
the test program in parallel will eventually get this in the guest
kernel:

handle_fpu_swa: fp_emulate() returned -1

and the test program gets killed with a SIGFPE.

-- 
Alex Williamson                             HP Open Source & Linux Org.


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