Commit 9430d58e authored Mar 22, 2006 by Mike Galbraith Committed by Linus Torvalds Mar 22, 2006

[PATCH] sched: remove sleep_avg multiplier



Remove the sleep_avg multiplier.  This multiplier was necessary back when
we had 10 seconds of dynamic range in sleep_avg, but now that we only have
one second, it causes that one second to be compressed down to 100ms in
some cases.  This is particularly noticeable when compiling a kernel in a
slow NFS mount, and I believe it to be a very likely candidate for other
recently reported network related interactivity problems.

In testing, I can detect no negative impact of this removal.

Signed-off-by: Mike Galbraith <efault@gmx.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent e952f31b

kernel/sched.c

+0 −6

Original line number	Diff line number	Diff line
		@@ -706,12 +706,6 @@ static int recalc_task_prio(task_t *p, unsigned long long now)
		p->sleep_avg = JIFFIES_TO_NS(MAX_SLEEP_AVG -
		DEF_TIMESLICE);
		} else {
		/*
		* The lower the sleep avg a task has the more
		* rapidly it will rise with sleep time.
		*/
		sleep_time *= (MAX_BONUS - CURRENT_BONUS(p)) ? : 1;

		/*
		* Tasks waking from uninterruptible sleep are
		* limited in their sleep_avg rise as they