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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-03-18 12:38:47 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-31 14:53:01 +0200 |
| commit | eedeeabdeeadb016b8c783e3620d06b98d0cb4e1 (patch) | |
| tree | f7353981f73c1db6a65ec403e04c4ddb4be48fc9 /kernel/lockdep.c | |
| parent | hrtimer: fix rq->lock inversion (again) (diff) | |
| download | linux-eedeeabdeeadb016b8c783e3620d06b98d0cb4e1.tar.xz linux-eedeeabdeeadb016b8c783e3620d06b98d0cb4e1.zip | |
lockdep: add stack dumps to asserts
Have a better idea about exactly which loc causes a lockdep
limit overflow. Often it's a bug or inefficiency in that
subsystem.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1237376327.5069.253.camel@laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/lockdep.c')
| -rw-r--r-- | kernel/lockdep.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/lockdep.c b/kernel/lockdep.c index 981cd4854281..a288ae107b50 100644 --- a/kernel/lockdep.c +++ b/kernel/lockdep.c @@ -792,6 +792,7 @@ register_lock_class(struct lockdep_map *lock, unsigned int subclass, int force) printk("BUG: MAX_LOCKDEP_KEYS too low!\n"); printk("turning off the locking correctness validator.\n"); + dump_stack(); return NULL; } class = lock_classes + nr_lock_classes++; @@ -855,6 +856,7 @@ static struct lock_list *alloc_list_entry(void) printk("BUG: MAX_LOCKDEP_ENTRIES too low!\n"); printk("turning off the locking correctness validator.\n"); + dump_stack(); return NULL; } return list_entries + nr_list_entries++; @@ -1681,6 +1683,7 @@ cache_hit: printk("BUG: MAX_LOCKDEP_CHAINS too low!\n"); printk("turning off the locking correctness validator.\n"); + dump_stack(); return 0; } chain = lock_chains + nr_lock_chains++; @@ -2540,6 +2543,7 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass, debug_locks_off(); printk("BUG: MAX_LOCKDEP_SUBCLASSES too low!\n"); printk("turning off the locking correctness validator.\n"); + dump_stack(); return 0; } @@ -2636,6 +2640,7 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass, debug_locks_off(); printk("BUG: MAX_LOCK_DEPTH too low!\n"); printk("turning off the locking correctness validator.\n"); + dump_stack(); return 0; } |