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Commit 4e2dcb73 authored by Zhang Hang's avatar Zhang Hang Committed by Ingo Molnar
Browse files

sched: Simplify can_migrate_task() 



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

Signed-off-by: default avatarZhang 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: default avatarIngo Molnar <mingo@kernel.org>
parent 28b4a521

kernel/sched/fair.c

+4 −7
Original line number Diff line number Diff line
@@ -3921,21 +3921,18 @@ 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);

	if (!tsk_cache_hot ||

		env->sd->nr_balance_failed > env->sd->cache_nice_tries) {

#ifdef CONFIG_SCHEDSTATS



		if (tsk_cache_hot) {

			schedstat_inc(env->sd, lb_hot_gained[env->idle]);

			schedstat_inc(p, se.statistics.nr_forced_migrations);

		}

#endif



		return 1;

	}



	if (tsk_cache_hot) {

	schedstat_inc(p, se.statistics.nr_failed_migrations_hot);

	return 0;

}

	return 1;

}



/*

 * move_one_task tries to move exactly one task from busiest to this_rq, as