diff options
| -rw-r--r-- | arch/x86/kernel/cpu/mcheck/mce.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c index 1217816..421020f 100644 --- a/arch/x86/kernel/cpu/mcheck/mce.c +++ b/arch/x86/kernel/cpu/mcheck/mce.c @@ -196,10 +196,32 @@ static void print_mce(struct mce *m) "and contact your hardware vendor\n"); } +#define PANIC_TIMEOUT 5 /* 5 seconds */ + +static atomic_t mce_paniced; + +/* Panic in progress. Enable interrupts and wait for final IPI */ +static void wait_for_panic(void) +{ + long timeout = PANIC_TIMEOUT*USEC_PER_SEC; + preempt_disable(); + local_irq_enable(); + while (timeout-- > 0) + udelay(1); + panic("Panicing machine check CPU died"); +} + static void mce_panic(char *msg, struct mce *final, char *exp) { int i; + /* + * Make sure only one CPU runs in machine check panic + */ + if (atomic_add_return(1, &mce_paniced) > 1) + wait_for_panic(); + barrier(); + bust_spinlocks(1); console_verbose(); /* First print corrected ones that are still unlogged */ |
