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Re: [Xen-devel] Runaway real/sys time in newer paravirt domUs?

from [Jan Beulich]

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To:	"Jed Smith" <jed@xxxxxxxxxx>
Subject:	Re: [Xen-devel] Runaway real/sys time in newer paravirt domUs?
From:	"Jan Beulich" <JBeulich@xxxxxxxxxx>
Date:	Fri, 09 Jul 2010 17:00:13 +0100
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>>> On 09.07.10 at 16:57, Jed Smith <jed@xxxxxxxxxx> wrote:
> On Jul 9, 2010, at 4:46 AM, Jan Beulich wrote:
>> Is this perhaps also dependent on the CPU make/model?
>  - Between 2.6.29 and 2.6.30, /proc/uptime behaves much differently, and the 
> bug
>    then exposes itself.  Something changed there.

Others as well as me had seen similar misbehavior (outside of pv-ops),
but only on reasonably new Intel systems. sched_clock_stable getting
set to one in arch/x86/kernel/cpu/intel.c turned out to be the problem.

Jan

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