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Commit 738d2be4 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

sched: Simplify set_task_cpu() 



Rearrange code a bit now that its a simpler function.

Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <20091216170518.269101883@chello.nl>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 88ec22d3

kernel/sched.c

+5 −8
Original line number Diff line number Diff line
@@ -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) {

	if (task_cpu(p) == new_cpu)

		return;



	p->se.nr_migrations++;

		perf_sw_event(PERF_COUNT_SW_CPU_MIGRATIONS,

				     1, 1, NULL, 0);

	}

	perf_sw_event(PERF_COUNT_SW_CPU_MIGRATIONS, 1, 1, NULL, 0);



	__set_task_cpu(p, new_cpu);

}