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sched: Simplify can_migrate_task()

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At this point tsk_cache_hot is always true, so no need to check it.

Signed-off-by: Zhang Hang <bob.zhanghang@huawei.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/51650107.9040606@huawei.com
[ Also remove unnecessary schedstat #ifdefs. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Zhang Hang 2013-04-10 14:04:55 +08:00 committed by Ingo Molnar
parent 28b4a521f6
commit 4e2dcb73ae
1 changed files with 4 additions and 7 deletions
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11
kernel/sched/fair.c
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@ -3921,20 +3921,17 @@ int can_migrate_task(struct task_struct *p, struct lb_env *env)
tsk_cache_hot = task_hot(p, env->src_rq->clock_task, env->sd); tsk_cache_hot = task_hot(p, env->src_rq->clock_task, env->sd);
if (!tsk_cache_hot || if (!tsk_cache_hot ||
env->sd->nr_balance_failed > env->sd->cache_nice_tries) { env->sd->nr_balance_failed > env->sd->cache_nice_tries) {
#ifdef CONFIG_SCHEDSTATS
if (tsk_cache_hot) { if (tsk_cache_hot) {
schedstat_inc(env->sd, lb_hot_gained[env->idle]); schedstat_inc(env->sd, lb_hot_gained[env->idle]);
schedstat_inc(p, se.statistics.nr_forced_migrations); schedstat_inc(p, se.statistics.nr_forced_migrations);
} }
#endif
return 1; return 1;
} }
if (tsk_cache_hot) { schedstat_inc(p, se.statistics.nr_failed_migrations_hot);
schedstat_inc(p, se.statistics.nr_failed_migrations_hot); return 0;
return 0;
}
return 1;
} }
/* /*