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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-03-18 07:38:47 -0400
committerIngo Molnar <mingo@elte.hu>2009-03-31 08:53:01 -0400
commiteedeeabdeeadb016b8c783e3620d06b98d0cb4e1 (patch)
treef7353981f73c1db6a65ec403e04c4ddb4be48fc9 /kernel
parent7f1e2ca9f04b02794597f60e7b1d43f0a1317939 (diff)
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')
-rw-r--r--kernel/lockdep.c5
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)
792 792
793 printk("BUG: MAX_LOCKDEP_KEYS too low!\n"); 793 printk("BUG: MAX_LOCKDEP_KEYS too low!\n");
794 printk("turning off the locking correctness validator.\n"); 794 printk("turning off the locking correctness validator.\n");
795 dump_stack();
795 return NULL; 796 return NULL;
796 } 797 }
797 class = lock_classes + nr_lock_classes++; 798 class = lock_classes + nr_lock_classes++;
@@ -855,6 +856,7 @@ static struct lock_list *alloc_list_entry(void)
855 856
856 printk("BUG: MAX_LOCKDEP_ENTRIES too low!\n"); 857 printk("BUG: MAX_LOCKDEP_ENTRIES too low!\n");
857 printk("turning off the locking correctness validator.\n"); 858 printk("turning off the locking correctness validator.\n");
859 dump_stack();
858 return NULL; 860 return NULL;
859 } 861 }
860 return list_entries + nr_list_entries++; 862 return list_entries + nr_list_entries++;
@@ -1681,6 +1683,7 @@ cache_hit:
1681 1683
1682 printk("BUG: MAX_LOCKDEP_CHAINS too low!\n"); 1684 printk("BUG: MAX_LOCKDEP_CHAINS too low!\n");
1683 printk("turning off the locking correctness validator.\n"); 1685 printk("turning off the locking correctness validator.\n");
1686 dump_stack();
1684 return 0; 1687 return 0;
1685 } 1688 }
1686 chain = lock_chains + nr_lock_chains++; 1689 chain = lock_chains + nr_lock_chains++;
@@ -2540,6 +2543,7 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass,
2540 debug_locks_off(); 2543 debug_locks_off();
2541 printk("BUG: MAX_LOCKDEP_SUBCLASSES too low!\n"); 2544 printk("BUG: MAX_LOCKDEP_SUBCLASSES too low!\n");
2542 printk("turning off the locking correctness validator.\n"); 2545 printk("turning off the locking correctness validator.\n");
2546 dump_stack();
2543 return 0; 2547 return 0;
2544 } 2548 }
2545 2549
@@ -2636,6 +2640,7 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass,
2636 debug_locks_off(); 2640 debug_locks_off();
2637 printk("BUG: MAX_LOCK_DEPTH too low!\n"); 2641 printk("BUG: MAX_LOCK_DEPTH too low!\n");
2638 printk("turning off the locking correctness validator.\n"); 2642 printk("turning off the locking correctness validator.\n");
2643 dump_stack();
2639 return 0; 2644 return 0;
2640 } 2645 }
2641 2646