sched: Allow SCHED_BATCH to preempt SCHED_IDLE tasks
authorDarren Hart <dvhart@linux.intel.com>
Tue, 22 Feb 2011 21:04:33 +0000 (13:04 -0800)
committerIngo Molnar <mingo@elte.hu>
Fri, 4 Mar 2011 10:14:29 +0000 (11:14 +0100)
commita2f5c9ab79f78e8b91ac993e0543d65b661dd19b
tree9fcdae7cad6745d02d5389ab591b454bb4c17b60
parente0a92c17470775cd85bac52f5372ccc3dc58254a
sched: Allow SCHED_BATCH to preempt SCHED_IDLE tasks

Perform the test for SCHED_IDLE before testing for SCHED_BATCH (and
ensure idle tasks don't preempt idle tasks) so the non-interactive,
but still important, SCHED_BATCH tasks will run in favor of the very
low priority SCHED_IDLE tasks.

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Mike Galbraith <efault@gmx.de>
Cc: Richard Purdie <richard.purdie@linuxfoundation.org>
LKML-Reference: <1298408674-3130-2-git-send-email-dvhart@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
kernel/sched_fair.c