From ad8ca495bd3e03e6751fc0c6a6af44018ebb4036 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Wed, 30 Jan 2008 13:33:24 +0100 Subject: [PATCH] x86: add warning to check_tsc_warp() add warning to check_tsc_warp() - if get_cycles() does not progress. Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/kernel/tsc_sync.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/tsc_sync.c b/arch/x86/kernel/tsc_sync.c index 7110078f242c..0577825cf89b 100644 --- a/arch/x86/kernel/tsc_sync.c +++ b/arch/x86/kernel/tsc_sync.c @@ -87,7 +87,11 @@ static __cpuinit void check_tsc_warp(void) nr_warps++; __raw_spin_unlock(&sync_lock); } - + } + if (!(now-start)) { + printk("Warning: zero tsc calibration delta: %Ld [max: %Ld]\n", + now-start, end-start); + WARN_ON(1); } } -- 2.30.2