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lockdep: add stack dumps to asserts

Browse source 
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>
This commit is contained in:
Peter Zijlstra 2009-03-18 12:38:47 +01:00 committed by Ingo Molnar
parent 7f1e2ca9f0
commit eedeeabdee
1 changed files with 5 additions and 0 deletions
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5
kernel/lockdep.c
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@ -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;
}