-stable review patch. If anyone has any objections, please let us know. --------------------- From: Thomas Gleixner upstream commit: 74dc51a3de06aa516e3b9fdc4017b2aeb38bf44b When the TSC calibration fails then TSC is still used in sched_clock(). Disable it completely in that case. Signed-off-by: Thomas Gleixner Cc: stable@kernel.org Signed-off-by: Chris Wright --- arch/x86/kernel/tsc_32.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/arch/x86/kernel/tsc_32.c +++ b/arch/x86/kernel/tsc_32.c @@ -401,6 +401,11 @@ void __init tsc_init(void) if (!cpu_khz) { mark_tsc_unstable("could not calculate TSC khz"); + /* + * We need to disable the TSC completely in this case + * to prevent sched_clock() from using it. + */ + tsc_disabled = 1; return; } -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/