Re: [Xen-devel] [BUG] xenstat_vcpu_ns returns invalid value

[Richard Kojedzinszky <richard@xxxxxxxxx>]

2020-01-09 21:10 időpontban Andrew Cooper ezt írta:
> On 09/01/2020 20:09, Richard Kojedzinszky wrote:
> > 2020-01-09 20:50 időpontban Andrew Cooper ezt írta:
> > > On 09/01/2020 19:40, Richard Kojedzinszky wrote:
> > > > 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;
> > > That was found and fixed a while ago.  c/s f28c4c4c10 "sched: don't 
> > > let
> > > XEN_RUNSTATE_UPDATE leak into vcpu_runstate_get()".
> > >
> > > No changes in userspace should be necessary, although you might need 
> > > to
> > > pester your distro for backports.
> > >
> > > ~Andrew
> > Hi,
> >
> > Thanks for the quick reply,
> >
> > Then, as it is just a leak, until a backport arrives to my distro, I
> > can mask out that bit from the results with no other side-effects, am
> > I right?
> Yes - that should be safe.
>
> ~Andrew
Hi,

Many thanks, I will do that.

Regards,
Richard

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