x86: add warning to check_tsc_warp()
authorIngo Molnar <mingo@elte.hu>
Wed, 30 Jan 2008 12:33:24 +0000 (13:33 +0100)
committerIngo Molnar <mingo@elte.hu>
Wed, 30 Jan 2008 12:33:24 +0000 (13:33 +0100)
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>
arch/x86/kernel/tsc_sync.c

index 7110078f242cd39ad76d0c8c554214f42ada36b7..0577825cf89bad5ecdac456fa13d12f4b8e2fa0e 100644 (file)
@@ -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);
        }
 }