Commit 28f36f8f authored by Guillaume Chazarain's avatar Guillaume Chazarain Committed by Andi Kleen
Browse files

[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: default avatarGuillaume Chazarain <guichaz@yahoo.fr>
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
parent 43999d9e

arch/i386/kernel/tsc.c

+1 −1
Original line number Diff line number Diff line
@@ -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);

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