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x86: fix cpufreq + sched_clock() regression
author
Peter Zijlstra
<peterz@infradead.org>
Mon, 25 Aug 2008 11:35:06 +0000
(13:35 +0200)
committer
Ingo Molnar
<mingo@elte.hu>
Mon, 25 Aug 2008 12:39:19 +0000
(14:39 +0200)
I noticed that my sched_clock() was slow on a number of machine, so I
started looking at cpufreq.
The below seems to fix the problem for me.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
arch/x86/kernel/tsc.c
patch
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diff --git
a/arch/x86/kernel/tsc.c
b/arch/x86/kernel/tsc.c
index
9bed5ca
..
8e786b0
100644
(file)
--- a/
arch/x86/kernel/tsc.c
+++ b/
arch/x86/kernel/tsc.c
@@
-314,7
+314,7
@@
static int time_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
mark_tsc_unstable("cpufreq changes");
}
- set_cyc2ns_scale(tsc_khz
_ref
, freq->cpu);
+ set_cyc2ns_scale(tsc_khz, freq->cpu);
return 0;
}