Re: [Xen-devel] [xen-4.1-testing test] 9805: regressions - FAIL

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Thu, Nov 17, 2011 at 10:37:01AM +0000, Keir Fraser wrote:
> On 17/11/2011 10:28, "Stefan Bader" <stefan.bader@xxxxxxxxxxxxx> wrote:
> 
> >>> Hm, yes we should. I am pretty sure I hit that code path often enough,
> >>> Wonder
> >>> why I never saw any dead lock there...
> >> 
> >> Perhaps your dom0 kernel doesn't register a pirq_eoi_map.
> >> 
> > Would be the only explanation. And quite possible. Heck, I would need to 
> > know
> > what that is used for anyway. :/ The kernel is 3.0 based the interrupt I was
> > looking at just was a normal apic emulated through events one...
> 
> Our automated tests still use 2.6.32. It wouldn't surprise me if upstream
> Linux 3 doesn't have the pirq_eoi_map stuff; it's an optimisation rather
> than core absolutely-required functionality.
> 
> It's the dom0 PV kernel that matters in this case by the way, not the kernel
> that you are running in HVM mode as a domU.
> 

Yep, I was testing with Linux 3.1 dom0 kernel, 
and there this patch worked OK without problems.

-- Pasi


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