Mailing List Archive

# HG changeset patch
# User Keir Fraser <keir.fraser@citrix.com>
# Date 1271243007 -3600
# Node ID 5cd44772fd21be0f88e5de813193a9918e805091
# Parent ae08db793febf3a8da6cd74f38988d69d87d81a5
credit2: Add context_saved scheduler callback

Because credit2 shares a runqueue between several cpus, it needs
to know when a scheduled-out process has finally been context-switched
away so that it can be added to the runqueue again. (Otherwise it may
be grabbed by another processor before the context has been properly
saved.)

Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>
---
xen/common/schedule.c | 2 ++
xen/include/xen/sched-if.h | 1 +
2 files changed, 3 insertions(+)

diff -r ae08db793feb -r 5cd44772fd21 xen/common/schedule.c
--- a/xen/common/schedule.c Wed Apr 14 11:56:54 2010 +0100
+++ b/xen/common/schedule.c Wed Apr 14 12:03:27 2010 +0100
@@ -885,6 +885,8 @@ void context_saved(struct vcpu *prev)
/* Check for migration request /after/ clearing running flag. */
smp_mb();

+ SCHED_OP(context_saved, prev);
+
if ( unlikely(test_bit(_VPF_migrating, &prev->pause_flags)) )
vcpu_migrate(prev);
}
diff -r ae08db793feb -r 5cd44772fd21 xen/include/xen/sched-if.h
--- a/xen/include/xen/sched-if.h Wed Apr 14 11:56:54 2010 +0100
+++ b/xen/include/xen/sched-if.h Wed Apr 14 12:03:27 2010 +0100
@@ -70,6 +70,7 @@ struct scheduler {

void (*sleep) (struct vcpu *);
void (*wake) (struct vcpu *);
+ void (*context_saved) (struct vcpu *);

struct task_slice (*do_schedule) (s_time_t);


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