diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-11 13:15:55 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-11 13:15:55 -0700 |
| commit | 989aa44a5f215427085ccfe65c1e378e3399c9eb (patch) | |
| tree | cd1993f2187e17e0e8d46d4fe12848e7be21fe96 /kernel | |
| parent | 4004f02d7af9bb1f5fd993fba60ed5bd0f5397a9 (diff) | |
| parent | 47cab6a722d44c71c4f8224017ef548522243cf4 (diff) | |
Merge branch 'core-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
debug lockups: Improve lockup detection, fix generic arch fallback
debug lockups: Improve lockup detection
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/rcutree.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c index 7717b95c2027..9c5fa9fc57ec 100644 --- a/kernel/rcutree.c +++ b/kernel/rcutree.c @@ -35,6 +35,7 @@ #include <linux/rcupdate.h> #include <linux/interrupt.h> #include <linux/sched.h> +#include <linux/nmi.h> #include <asm/atomic.h> #include <linux/bitops.h> #include <linux/module.h> @@ -469,6 +470,8 @@ static void print_other_cpu_stall(struct rcu_state *rsp) } printk(" (detected by %d, t=%ld jiffies)\n", smp_processor_id(), (long)(jiffies - rsp->gp_start)); + trigger_all_cpu_backtrace(); + force_quiescent_state(rsp, 0); /* Kick them all. */ } @@ -479,12 +482,14 @@ static void print_cpu_stall(struct rcu_state *rsp) printk(KERN_ERR "INFO: RCU detected CPU %d stall (t=%lu jiffies)\n", smp_processor_id(), jiffies - rsp->gp_start); - dump_stack(); + trigger_all_cpu_backtrace(); + spin_lock_irqsave(&rnp->lock, flags); if ((long)(jiffies - rsp->jiffies_stall) >= 0) rsp->jiffies_stall = jiffies + RCU_SECONDS_TILL_STALL_RECHECK; spin_unlock_irqrestore(&rnp->lock, flags); + set_need_resched(); /* kick ourselves to get things going. */ } |