From 28f36f8fbf5f3718f7095055c1911a67d200dda1 Mon Sep 17 00:00:00 2001 From: Guillaume Chazarain Date: Fri, 16 Mar 2007 21:07:36 +0100 Subject: [PATCH] [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 Signed-off-by: Andi Kleen --- arch/i386/kernel/tsc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/i386/kernel/tsc.c b/arch/i386/kernel/tsc.c index 602660d..0e65f7ab 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); -- 2.7.4