Re: [Xen-devel] time accounting problem in pvops kernel

[Paolo Bonzini <pbonzini@xxxxxxxxxx>]

On 08/18/2010 12:51 AM, Jeremy Fitzhardinge wrote:
>   On 08/17/2010 10:29 AM, Paolo Bonzini wrote:
> > Hi,
> >
> > while experimenting a bit with time.c we found a bug in time
> > accounting.  Basically, /proc/stat counts idle time twice for PV guests
> > running a pvops kernel
> What version?
I was using the latest RHEL6 snapshot + the 16-patch blkfront series 
(i.e. without the patch you pointed out).
> Upstream and stable kernels contain the changeset "xen:
> drop xen_sched_clock in favour of using plain wallclock time" which
> should fix a lot of timekeeping/scheduling problems.
I'll try this patch; however, offhand I don't see how it fixes the 
problem of calling account_idle_ticks twice.
Paolo

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