Re: [Xen-devel] How to Stop scheduler

[George Dunlap <george.dunlap@xxxxxxxxxxxxx>]

If you call vcpu_pause(), it atomically increments a counter in the vcpu 
struct.  While that counter is non-zero, the vcpu *will not* be 
scheduled, interrupts or no.  Interrupts will be delivered when it's 
scheduled again.
-George

Pankaj Parakh wrote:
>  If I pause a vcpu/domain using those functions, say if a domain's I/O
> request over then its interrupt will raise and it can restart its
> scheduling rite..?? How this interrupts are/ can be queued so that
> when the vcpu is in pause state, it should nat change its state and
> when it come back to wait state, those interrupt will not be lost..
>
> On Tue, Nov 3, 2009 at 5:18 PM, George Dunlap
> <George.Dunlap@xxxxxxxxxxxxx> wrote:
>   
> > Do you mean that you want to stop one specific vcpu / domain from
> > being scheduled?
> >
> > If so, you're looking for the following functions:
> > vcpu_pause(), vcpu_unpause()
> > domain_pause(), domain_unpause().
> >
> > They're defined in xen/common/domain.c.
> >
> >  -George
> >
> >
> > On Mon, Nov 2, 2009 at 9:02 PM, Pankaj Parakh <me.pankajparakh@xxxxxxxxx> wrote:
> >     
> > > Hi All,
> > >
> > > I am working on a project wherein I wanted to stop the scheduling
> > > activity in hypervisor through 'generic' part of scheduler, I have lil
> > > confusion as to what all things I need to mask/stop for disabling
> > > hypervisor to schedule any vcpu untill I want.
> > >
> > > Issues which I can think are about I/O waits or Zombie VCPUs. But how
> > > to tackle them... I dont know..
> > >
> > > I wanted to know what all responsibility the generic scheduler holds
> > > in hypervisor,
> > >
> > > Any type of info or pointer can be useful.
> > >
> > > Thanks
> > > Pankaj Parakh
> > >
> > > _______________________________________________
> > > Xen-devel mailing list
> > > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > > http://lists.xensource.com/xen-devel
> > >
> > >       
>
>
>   

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