Re: [Xen-devel] [PATCH 04/24] xen: credit2: properly schedule migration of a running vcpu.

[George Dunlap <george.dunlap@xxxxxxxxxx>]

On 17/08/16 18:18, Dario Faggioli wrote:
> If wanting to migrate a vcpu that is actually running,
> we need to ask the scheduler to chime in as soon as
> possible, to have the vcpu itself stopped and actually
> moved.
> 
> Make sure this happens by, after setting all the relevant
> flags, raising the scheduler softirq.
> 
> Signed-off-by: Dario Faggioli <dario.faggioli@xxxxxxxxxx>

Acked-by: George Dunlap <george.dunlap@xxxxxxxxxx>

> ---
> Cc: George Dunlap <george.dunlap@xxxxxxxxxx>
> Cc: Anshul Makkar <anshul.makkar@xxxxxxxxxx>
> ---
>  xen/common/sched_credit2.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/xen/common/sched_credit2.c b/xen/common/sched_credit2.c
> index a5a744f..12dfd20 100644
> --- a/xen/common/sched_credit2.c
> +++ b/xen/common/sched_credit2.c
> @@ -1667,6 +1667,7 @@ static void migrate(const struct scheduler *ops,
>          svc->migrate_rqd = trqd;
>          __set_bit(_VPF_migrating, &svc->vcpu->pause_flags);
>          __set_bit(__CSFLAG_runq_migrate_request, &svc->flags);
> +        cpu_raise_softirq(svc->vcpu->processor, SCHEDULE_SOFTIRQ);
>          SCHED_STAT_CRANK(migrate_requested);
>      }
>      else
> 


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel