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author | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:33:24 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:33:24 +0100 |
commit | ad8ca495bd3e03e6751fc0c6a6af44018ebb4036 (patch) | |
tree | 33dafcf26cad883f0eac2f4119408e60195614b1 /arch/x86/kernel/tsc_sync.c | |
parent | x86: check_tsc_warp() slowness fix (diff) | |
download | linux-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.c | 6 |
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); } } |