diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-06-03 15:47:51 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-06-03 15:47:51 -0700 |
| commit | 39d112100e561686ab1e2b19c57984163ad6c1fa (patch) | |
| tree | 19b3cd50345306de6f95b58b4a35e8f725786b9b /kernel/sched_fair.c | |
| parent | 167b7129042a4b4c09bb4ede5482ff79340a3999 (diff) | |
| parent | 02f726949f2be0967aa4871dd4e47d3967779b26 (diff) | |
Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
sched, trace: Fix sched_switch() prev_state argument
sched: Fix wake_affine() vs RT tasks
sched: Make sure timers have migrated before killing the migration_thread
Diffstat (limited to 'kernel/sched_fair.c')
| -rw-r--r-- | kernel/sched_fair.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 217e4a9393e4..eed35eded602 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -1225,7 +1225,6 @@ static int wake_affine(struct sched_domain *sd, struct task_struct *p, int sync) unsigned long this_load, load; int idx, this_cpu, prev_cpu; unsigned long tl_per_task; - unsigned int imbalance; struct task_group *tg; unsigned long weight; int balanced; @@ -1252,8 +1251,6 @@ static int wake_affine(struct sched_domain *sd, struct task_struct *p, int sync) tg = task_group(p); weight = p->se.load.weight; - imbalance = 100 + (sd->imbalance_pct - 100) / 2; - /* * In low-load situations, where prev_cpu is idle and this_cpu is idle * due to the sync cause above having dropped this_load to 0, we'll @@ -1263,9 +1260,21 @@ static int wake_affine(struct sched_domain *sd, struct task_struct *p, int sync) * Otherwise check if either cpus are near enough in load to allow this * task to be woken on this_cpu. */ - balanced = !this_load || - 100*(this_load + effective_load(tg, this_cpu, weight, weight)) <= - imbalance*(load + effective_load(tg, prev_cpu, 0, weight)); + if (this_load) { + unsigned long this_eff_load, prev_eff_load; + + this_eff_load = 100; + this_eff_load *= power_of(prev_cpu); + this_eff_load *= this_load + + effective_load(tg, this_cpu, weight, weight); + + prev_eff_load = 100 + (sd->imbalance_pct - 100) / 2; + prev_eff_load *= power_of(this_cpu); + prev_eff_load *= load + effective_load(tg, prev_cpu, 0, weight); + + balanced = this_eff_load <= prev_eff_load; + } else + balanced = true; /* * If the currently running task will sleep within @@ -2298,6 +2307,7 @@ static void update_cpu_power(struct sched_domain *sd, int cpu) if (!power) power = 1; + cpu_rq(cpu)->cpu_power = power; sdg->cpu_power = power; } |