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

tip-bot for Kirill Tkhai
2014-10-03T05:29:03Z

Commit-ID: 10a12983b3d437a6998b3845870e52c1c752c101
Gitweb: http://git.kernel.org/tip/10a12983b3d437a6998b3845870e52c1c752c101
Author: Kirill Tkhai <ktkhai@parallels.com>
AuthorDate: Wed, 1 Oct 2014 01:04:44 +0400
Committer: Ingo Molnar <mingo@kernel.org>
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@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>
---
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;