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| author | Ingo Molnar <mingo@elte.hu> | 2007-10-15 17:00:18 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2007-10-15 17:00:18 +0200 |
| commit | 6bc1665ba71de0f207391b01b187b21b2619c15c (patch) | |
| tree | efb135b9e389046a70816bb59df11bd265f93f53 /kernel | |
| parent | sched: debug, improve migration statistics (diff) | |
| download | linux-6bc1665ba71de0f207391b01b187b21b2619c15c.tar.xz linux-6bc1665ba71de0f207391b01b187b21b2619c15c.zip | |
sched: allow the immediate migration of cache-cold tasks
allow the immediate migration of cache-cold tasks.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 3b27c3a553aa..750612751a7f 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -1016,6 +1016,11 @@ task_hot(struct task_struct *p, u64 now, struct sched_domain *sd) if (p->sched_class != &fair_sched_class) return 0; + if (sysctl_sched_migration_cost == -1) + return 1; + if (sysctl_sched_migration_cost == 0) + return 0; + delta = now - p->se.exec_start; return delta < (s64)sysctl_sched_migration_cost; @@ -2189,7 +2194,8 @@ int can_migrate_task(struct task_struct *p, struct rq *rq, int this_cpu, * 2) too many balance attempts have failed. */ - if (sd->nr_balance_failed > sd->cache_nice_tries) { + if (!task_hot(p, rq->clock, sd) || + sd->nr_balance_failed > sd->cache_nice_tries) { #ifdef CONFIG_SCHEDSTATS if (task_hot(p, rq->clock, sd)) { schedstat_inc(sd, lb_hot_gained[idle]); |