Commit-ID: 465499895e41ee15ebc75fe90dfe7b595e9b46d5
Gitweb: http://git.kernel.org/tip/465499895e41ee15ebc75fe90dfe7b595e9b46d5
Author: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
AuthorDate: Wed, 18 Mar 2009 12:38:47 +0100
Commit: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Wed, 18 Mar 2009 12:55:10 +0100
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@xxxxxxxxx>
LKML-Reference: <1237376327.5069.253.camel@laptop>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
kernel/lockdep.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index 9a1e2bc..77ac37f 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++;
@@ -2523,6 +2526,7 @@ 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;
}
@@ -2619,6 +2623,7 @@ 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;
}
--
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