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authorBen Greear <greearb@candelatech.com>2013-02-06 10:56:19 -0800
committerIngo Molnar <mingo@kernel.org>2013-02-19 08:42:44 +0100
commitc0540606837af79b2ae101e5e7b2206e3844d150 (patch)
tree4ddf51f76483ad2d252d8e0fc9de15bfc7e94b9c /kernel/lockdep.c
parentce6711f3d196f09ca0ed29a24dfad42d83912b20 (diff)
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op-kernel-dev-c0540606837af79b2ae101e5e7b2206e3844d150.tar.gz
lockdep: Print more info when MAX_LOCK_DEPTH is exceeded
This helps debug cases where a lock is acquired over and over without being released. Suggested-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Ben Greear <greearb@candelatech.com> Cc: peterz@infradead.org Link: http://lkml.kernel.org/r/1360176979-4421-1-git-send-email-greearb@candelatech.com [ Changed the printout ordering. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/lockdep.c')
-rw-r--r--kernel/lockdep.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index 5cf12e7..8a0efac 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -3190,9 +3190,14 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass,
#endif
if (unlikely(curr->lockdep_depth >= MAX_LOCK_DEPTH)) {
debug_locks_off();
- printk("BUG: MAX_LOCK_DEPTH too low!\n");
+ printk("BUG: MAX_LOCK_DEPTH too low, depth: %i max: %lu!\n",
+ curr->lockdep_depth, MAX_LOCK_DEPTH);
printk("turning off the locking correctness validator.\n");
+
+ lockdep_print_held_locks(current);
+ debug_show_all_locks();
dump_stack();
+
return 0;
}
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