Re: [Xen-devel] High CPU temp, suspend problem - xen 4.1.5-pre, linux 3.7.x

[Marek Marczykowski <marmarek@xxxxxxxxxxxxxxxxxxxxxx>]

On 27.03.2013 09:52, Jan Beulich wrote:
>>>> On 26.03.13 at 19:50, Andrew Cooper <andrew.cooper3@xxxxxxxxxx> wrote:
>> So vector e9 doesn't appear to be programmed in anywhere.
> 
> Quite obviously, as it's the 8259A vector for IRQ 9. The question
> really is why an IRQ appears on that vector in the first place. The
> 8259A resume code _should_ leave all IRQs masked on a fully
> IO-APIC system (see my question raised yesterday).
> 
> And that's also why I suggested, for an experiment, to fiddle with
> the loop exit condition to exclude legacy vectors (which wouldn't
> be a final solution, but would at least tell us whether the direction
> is the right one). In the end, besides understanding why an
> interrupt on vector E9 gets raised at all, we may also need to
> tweak the IRQ migration logic to not do anything on legacy IRQs,
> but that would need to happen earlier than in
> smp_irq_move_cleanup_interrupt(). Considering that 4.3
> apparently doesn't have this problem, we may need to go hunt for
> a change that isn't directly connected to this, yet deals with the
> problem as a side effect (at least I don't recall any particular fix
> since 4.2). One aspect here is the double mapping of legacy IRQs
> (once to their IO-APIC vector, and once to their legacy vector,
> i.e. vector_irq[] having two entries pointing to the same IRQ).

So tried change loop condition to LAST_DYNAMIC_VECTOR and it doesn't hit that
BUG/ASSERT. But still it doesn't work - only CPU0 used by scheduler, also some
errors from dom0 kernel, and errors about PCI devices used by domU(1).

Messages from resume (different tries):
http://duch.mimuw.edu.pl/~marmarek/qubes/xen-4.1-last-dynamic-vector.log
http://duch.mimuw.edu.pl/~marmarek/qubes/xen-4.1-last-dynamic-vector2.log

Also one time I've got fatal page fault error, earlier in resume (it isn't
deterministic):
http://duch.mimuw.edu.pl/~marmarek/qubes/xen-4.1-resume-page-fault.log

-- 
Best Regards / Pozdrawiam,
Marek Marczykowski
Invisible Things Lab

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