[PATCH] i386: Don't use the TSC in sched_clock if unstable

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f9690982b8c2f9a2c65acdc113e758ec356676a3
caused a regression by letting sched_clock use the TSC even when cpufreq
disabled it. This caused scheduling weirdnesses.

Signed-off-by: Guillaume Chazarain <guichaz@yahoo.fr>
Signed-off-by: Andi Kleen <ak@suse.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/i386/kernel/tsc.c b/arch/i386/kernel/tsc.c
index 602660df455c..0e65f7ab63a2 100644
--- a/arch/i386/kernel/tsc.c
+++ b/arch/i386/kernel/tsc.c
@@ -105,7 +105,7 @@ unsigned long long sched_clock(void)
         /*
          * Fall back to jiffies if there's no TSC available:
          */
-        if (unlikely(tsc_disable))
+        if (tsc_unstable || unlikely(tsc_disable))
                 /* No locking but a rare wrong value is not a big deal: */
                 return (jiffies_64 - INITIAL_JIFFIES) * (1000000000 / HZ);