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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2007-10-15 17:00:18 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2007-10-15 17:00:18 +0200 |
| commit | ff56b2f01537aef7237d5ac8bf6bfbb409c1a127 (patch) | |
| tree | 52f7a687f8d3e15b17dc8e6a1789cc537e87d6c8 /kernel/sched.c | |
| parent | sched: reintroduce cache-hot affinity (diff) | |
| download | linux-ff56b2f01537aef7237d5ac8bf6bfbb409c1a127.tar.xz linux-ff56b2f01537aef7237d5ac8bf6bfbb409c1a127.zip | |
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 <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched.c')
| -rw-r--r-- | kernel/sched.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 089d8b12ab76..945ab1322e18 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; } /* |