Greetings,
The patchlet below removes 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. IMHO, this
constitutes a bug-fix, and as such is suitable for 2.6.16.
-Mike
Signed-off-by: Mike Galbraith <[email protected]>
--- linux-2.6.16rc6/kernel/sched.c.org 2006-03-14 10:30:35.000000000 +0100
+++ linux-2.6.16rc6/kernel/sched.c 2006-03-14 10:31:13.000000000 +0100
@@ -707,12 +707,6 @@
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
* are likely to be waiting on I/O
-
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