Commit 10a12983 authored Oct 01, 2014 by Kirill Tkhai Committed by Ingo Molnar Oct 03, 2014

sched/fair: Delete resched_cpu() from idle_balance()



We already reschedule env.dst_cpu in attach_tasks()->check_preempt_curr()
if this is necessary.

Furthermore, a higher priority class task may be current on dest rq,
we shouldn't disturb it.

Signed-off-by: Kirill Tkhai <ktkhai@parallels.com>
Cc: Juri Lelli <juri.lelli@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20140930210441.5258.55054.stgit@localhost


Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent 347abad9

kernel/sched/fair.c

+0 −6

Original line number	Diff line number	Diff line
		@@ -6701,12 +6701,6 @@ static int load_balance(int this_cpu, struct rq *this_rq,

		local_irq_restore(flags);

		/*
		* some other cpu did the load balance for us.
		*/
		if (cur_ld_moved && env.dst_cpu != smp_processor_id())
		resched_cpu(env.dst_cpu);

		if (env.flags & LBF_NEED_BREAK) {
		env.flags &= ~LBF_NEED_BREAK;
		goto more_balance;