sched: optimize cond_resched()

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Optimize cond_resched() by removing one conditional.

Currently cond_resched() checks system_state ==
SYSTEM_RUNNING in order to avoid scheduling before the
scheduler is running.

We can however, as per suggestion of Matt, use
PREEMPT_ACTIVE to accomplish that very same.

Suggested-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

...

This commit is contained in:

Peter Zijlstra 2009-07-10 14:57:57 +02:00 • committed by Linus Torvalds

parent c99e6efe1b

commit d86ee4809d

2 changed files with 13 additions and 6 deletions

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5

include/linux/sched.h

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14

kernel/sched.c

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