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authorIngo Molnar <mingo@elte.hu>2008-01-30 13:33:24 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-30 13:33:24 +0100
commitad8ca495bd3e03e6751fc0c6a6af44018ebb4036 (patch)
tree33dafcf26cad883f0eac2f4119408e60195614b1 /arch/x86/kernel/tsc_sync.c
parentx86: check_tsc_warp() slowness fix (diff)
downloadlinux-ad8ca495bd3e03e6751fc0c6a6af44018ebb4036.tar.xz
linux-ad8ca495bd3e03e6751fc0c6a6af44018ebb4036.zip
x86: add warning to check_tsc_warp()
add warning to check_tsc_warp() - if get_cycles() does not progress. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/tsc_sync.c')
-rw-r--r--arch/x86/kernel/tsc_sync.c6
1 files changed, 5 insertions, 1 deletions
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);
}
}