[tip:sched/core] sched/fair: Delete resched_cpu() from idle_balance()

[tip-bot for Kirill Tkhai]

Commit-ID:  10a12983b3d437a6998b3845870e52c1c752c101
Gitweb:     http://git.kernel.org/tip/10a12983b3d437a6998b3845870e52c1c752c101
Author:     Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
AuthorDate: Wed, 1 Oct 2014 01:04:44 +0400
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Fri, 3 Oct 2014 05:46:56 +0200

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@xxxxxxxxxxxxx>
Cc: Juri Lelli <juri.lelli@xxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20140930210441.5258.55054.stgit@localhost
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 kernel/sched/fair.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index dfdcbfd..bd61cff 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -6701,12 +6701,6 @@ more_balance:
 
 		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;
--
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