Dear Xen Devs,
commit 2529c850ea48f036727ca2f148caed89391311b8 introduces the
XEN_RUNSTATE_UPDATE marker bit, which is not handled in
vcpu_runstate_get() in xen/common/schedule.c. Relevant code:
delta = NOW() - runstate->state_entry_time;
if ( delta > 0 )
runstate->time[runstate->state] += delta;
If state_entry_time has the bit set, it will be a negative value, so
delta will be greater than 0, actually the marker bit
will appear in runstate->time too. This causes the MSB bit set in the
return of xenstat_vcpu_ns(). Is it true, that when reading these values
through xenstat, the user should take care of this bit, and reread, or
is it a bug in the relevant code?
I am using xenstat.h interface, where I can only request statistics for
the whole node. So, basically, walking through all vcpu of all domain,
and checking that no one
contains this bit seems a bit ugly solution.
Thanks in advance,
Richard Kojedzinszky
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