tree 8cf21e8fd5c5bc513923fd38acfc562ae0ab39d1
parent 65eb3dc609dec17deea48dcd4de2e549d29a9824
author Bharata B Rao <bharata@linux.vnet.ibm.com> 1219914769 +0530
committer Ingo Molnar <mingo@elte.hu> 1219916151 +0200

sched: call resched_task() conditionally from new task wake up path

- During wake up of a new task, task_new_fair() can do a resched_task()
  on the current task. Later in the code path, check_preempt_curr() also ends
  up doing the same, which can be avoided. Check if TIF_NEED_RESCHED is
  already set for the current task.

- task_new_fair() does a resched_task() on the current task unconditionally.
  This can be done only in case when child runs before the parent.

So this is a small speedup.

Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>