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sched/cfs_rq: Change atomic64_t removed_load to atomic_long_t

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Similar to runnable_load_avg, blocked_load_avg variable, long type is
enough for removed_load in 64 bit or 32 bit machine.

Then we avoid the expensive atomic64 operations on 32 bit machine.

Signed-off-by: Alex Shi <alex.shi@intel.com>
Reviewed-by: Paul Turner <pjt@google.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1371694737-29336-12-git-send-email-alex.shi@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Alex Shi
2013-06-20 10:18:55 +08:00
committed by Ingo Molnar
parent bf5b986ed4
commit 2509940fd7
2 changed files with 8 additions and 5 deletions
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3
kernel/sched/sched.h
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@@ -278,8 +278,9 @@ struct cfs_rq {
* the FAIR_GROUP_SCHED case).
*/
unsigned long runnable_load_avg, blocked_load_avg;
atomic64_t decay_counter, removed_load;
atomic64_t decay_counter;
u64 last_decay;
atomic_long_t removed_load;
#ifdef CONFIG_FAIR_GROUP_SCHED
/* Required to track per-cpu representation of a task_group */