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| author | Ben Greear <greearb@candelatech.com> | 2013-02-06 10:56:19 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-02-19 08:42:44 +0100 |
| commit | c0540606837af79b2ae101e5e7b2206e3844d150 (patch) | |
| tree | 4ddf51f76483ad2d252d8e0fc9de15bfc7e94b9c /kernel/lockdep.c | |
| parent | ce6711f3d196f09ca0ed29a24dfad42d83912b20 (diff) | |
| download | lwn-c0540606837af79b2ae101e5e7b2206e3844d150.tar.gz lwn-c0540606837af79b2ae101e5e7b2206e3844d150.zip | |
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.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/lockdep.c b/kernel/lockdep.c index 5cf12e791603..8a0efac4f99d 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; } |