Re: [PATCH v2] kvm: Fix accounting of interrupts during guest execution on s390

[Ingo Molnar <mingo-X9Un+BFzKDI@public.gmane.org>]

* Christian Borntraeger <borntraeger-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org> wrote:

> Avi pointed out, that my first patch was broken, here is the 2nd try. 
> I tested the patch on s390 with CONFIG_VIRT_CPU_ACCOUNTING and on 
> x86_64. Seems to work.
> 
> Currently the scheduler checks for PF_VCPU to decide if this timeslice 
> has to be accounted as guest time. On s390 host interrupts are not 
> disabled during guest execution. This causes theses interrupts to be 
> accounted as guest time if CONFIG_VIRT_CPU_ACCOUNTING is set. Solution 
> is to check if an interrupt triggered account_system_time. As the tick 
> is timer interrupt based, we have to subtract hardirq_offset.
> 
> Avi, Ingo, Laurent, feedback is welcome.

thanks, applied. I'll push this out as part of the scheduler git tree, 
ok?

	Ingo

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