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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-12-16 17:04:42 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-12-16 18:01:59 (GMT) |
| commit | 738d2be4301007f054541c5c4bf7fb6a361c9b3a (patch) | |
| tree | 6d37c04fa3b35d5fe820ab2df1088ba596fefe38 /kernel/sched.c | |
| parent | 88ec22d3edb72b261f8628226cd543589a6d5e1b (diff) | |
| download | linux-738d2be4301007f054541c5c4bf7fb6a361c9b3a.tar.xz | |
sched: Simplify set_task_cpu()
Rearrange code a bit now that its a simpler function.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <20091216170518.269101883@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched.c')
| -rw-r--r-- | kernel/sched.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index f92ce63..8a2bfd3 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -2034,11 +2034,8 @@ task_hot(struct task_struct *p, u64 now, struct sched_domain *sd) return delta < (s64)sysctl_sched_migration_cost; } - void set_task_cpu(struct task_struct *p, unsigned int new_cpu) { - int old_cpu = task_cpu(p); - #ifdef CONFIG_SCHED_DEBUG /* * We should never call set_task_cpu() on a blocked task, @@ -2049,11 +2046,11 @@ void set_task_cpu(struct task_struct *p, unsigned int new_cpu) trace_sched_migrate_task(p, new_cpu); - if (old_cpu != new_cpu) { - p->se.nr_migrations++; - perf_sw_event(PERF_COUNT_SW_CPU_MIGRATIONS, - 1, 1, NULL, 0); - } + if (task_cpu(p) == new_cpu) + return; + + p->se.nr_migrations++; + perf_sw_event(PERF_COUNT_SW_CPU_MIGRATIONS, 1, 1, NULL, 0); __set_task_cpu(p, new_cpu); } |