[Xen-changelog] [xen master] xen: credit2: properly schedule migration of a running vcpu.

[patchbot@xxxxxxx]

commit 115e4c5e52c14c126cd8ae0dfe0322c95b65e3c8
Author:     Dario Faggioli <dario.faggioli@xxxxxxxxxx>
AuthorDate: Thu Sep 15 12:35:04 2016 +0100
Commit:     George Dunlap <george.dunlap@xxxxxxxxxx>
CommitDate: Thu Sep 15 12:39:47 2016 +0100

    xen: credit2: properly schedule migration of a running vcpu.
    
    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>
---
 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
--
generated by git-patchbot for /home/xen/git/xen.git#master

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