[Xen-changelog] [xen-unstable] scheduler: Add a per-scheduler yield callback

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1281368127 -3600
# Node ID 93074767205e33fc1351a61343a5c5a0fde4f9d5
# Parent  befd1814c0a262ce0d6c96727a76b907cdeecdc4
scheduler: Add a per-scheduler yield callback

Signed-off-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
---
 xen/common/schedule.c      |    6 ++++++
 xen/include/xen/sched-if.h |    1 +
 2 files changed, 7 insertions(+)

diff -r befd1814c0a2 -r 93074767205e xen/common/schedule.c
--- a/xen/common/schedule.c     Mon Aug 09 16:33:45 2010 +0100
+++ b/xen/common/schedule.c     Mon Aug 09 16:35:27 2010 +0100
@@ -642,6 +642,12 @@ static long do_poll(struct sched_poll *s
 /* Voluntarily yield the processor for this allocation. */
 static long do_yield(void)
 {
+    struct vcpu * v=current;
+
+    vcpu_schedule_lock_irq(v);
+    SCHED_OP(VCPU2OP(v), yield, v);
+    vcpu_schedule_unlock_irq(v);
+
     TRACE_2D(TRC_SCHED_YIELD, current->domain->domain_id, current->vcpu_id);
     raise_softirq(SCHEDULE_SOFTIRQ);
     return 0;
diff -r befd1814c0a2 -r 93074767205e xen/include/xen/sched-if.h
--- a/xen/include/xen/sched-if.h        Mon Aug 09 16:33:45 2010 +0100
+++ b/xen/include/xen/sched-if.h        Mon Aug 09 16:35:27 2010 +0100
@@ -107,6 +107,7 @@ struct scheduler {
 
     void         (*sleep)          (const struct scheduler *, struct vcpu *);
     void         (*wake)           (const struct scheduler *, struct vcpu *);
+    void         (*yield)          (const struct scheduler *, struct vcpu *);
     void         (*context_saved)  (const struct scheduler *, struct vcpu *);
 
     struct task_slice (*do_schedule) (const struct scheduler *, s_time_t,

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