Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ff56b2f01537aef7237d5ac8bf6bfbb409c1a127
Commit: ff56b2f01537aef7237d5ac8bf6bfbb409c1a127
Parent: da84d96176729fb48a8458561e5d8647103168b8
Author: Peter Zijlstra <[EMAIL PROTECTED]>
AuthorDate: Mon Oct 15 17:00:18 2007 +0200
Committer: Ingo Molnar <[EMAIL PROTECTED]>
CommitDate: Mon Oct 15 17:00:18 2007 +0200
sched: activate task_hot() only on fair-scheduled tasks
activate task_hot() only for fair-scheduled tasks (i.e. disable it
for RT tasks).
Signed-off-by: Peter Zijlstra <[EMAIL PROTECTED]>
Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
---
kernel/sched.c | 11 ++++++++---
1 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/kernel/sched.c b/kernel/sched.c
index 089d8b1..945ab13 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -2122,11 +2122,16 @@ static void pull_task(struct rq *src_rq, struct
task_struct *p,
* Is this task likely cache-hot:
*/
static inline int
-task_hot(struct task_struct *p, unsigned long long now, struct sched_domain
*sd)
+task_hot(struct task_struct *p, u64 now, struct sched_domain *sd)
{
- s64 delta = now - p->se.exec_start;
+ s64 delta;
- return delta < (long long)sysctl_sched_migration_cost;
+ if (p->sched_class != &fair_sched_class)
+ return 0;
+
+ delta = now - p->se.exec_start;
+
+ return delta < (s64)sysctl_sched_migration_cost;
}
/*
-
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