diff options
Diffstat (limited to 'kernel/softlockup.c')
| -rw-r--r-- | kernel/softlockup.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/kernel/softlockup.c b/kernel/softlockup.c index e423b3a918fd..65839c54abf5 100644 --- a/kernel/softlockup.c +++ b/kernel/softlockup.c @@ -15,6 +15,8 @@ #include <linux/notifier.h> #include <linux/module.h> +#include <asm/irq_regs.h> + static DEFINE_SPINLOCK(print_lock); static DEFINE_PER_CPU(unsigned long, touch_timestamp); @@ -72,6 +74,7 @@ void softlockup_tick(void) int this_cpu = smp_processor_id(); unsigned long touch_timestamp = per_cpu(touch_timestamp, this_cpu); unsigned long print_timestamp; + struct pt_regs *regs = get_irq_regs(); unsigned long now; if (touch_timestamp == 0) { @@ -101,15 +104,18 @@ void softlockup_tick(void) wake_up_process(per_cpu(watchdog_task, this_cpu)); /* Warn about unreasonable 10+ seconds delays: */ - if (now > (touch_timestamp + 10)) { - per_cpu(print_timestamp, this_cpu) = touch_timestamp; + if (now <= (touch_timestamp + 10)) + return; - spin_lock(&print_lock); - printk(KERN_ERR "BUG: soft lockup detected on CPU#%d!\n", - this_cpu); + per_cpu(print_timestamp, this_cpu) = touch_timestamp; + + spin_lock(&print_lock); + printk(KERN_ERR "BUG: soft lockup detected on CPU#%d!\n", this_cpu); + if (regs) + show_regs(regs); + else dump_stack(); - spin_unlock(&print_lock); - } + spin_unlock(&print_lock); } /* |