From: Dmitry Adamushko <dmitry.adamushko@gmail.com>
Date: Tue, 8 May 2007 07:33:06 +0000 (-0700)
Subject: sched: redundant reschedule when set_user_nice() boosts a prio of a task from the... 
X-Git-Tag: v2.6.22-rc1~576
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bd53f96ca54a21c07e7a0ae1886fa623d370b85f;p=pandora-kernel.git

sched: redundant reschedule when set_user_nice() boosts a prio of a task from the "expired" array

- Make TASK_PREEMPTS_CURR(task, rq) return "true" only if the task's prio
  is higher than the current's one and the task is in the "active" array.
  This ensures we don't make redundant resched_task() calls when the task
  is in the "expired" array (as may happen now in set_user_prio(),
  rt_mutex_setprio() and pull_task() ) ;

- generalise conditions for a call to resched_task() in set_user_nice(),
  rt_mutex_setprio() and sched_setscheduler()

Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com>
Cc: Con Kolivas <kernel@kolivas.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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