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>
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@ -3190,9 +3190,14 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass,
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#endif
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if (unlikely(curr->lockdep_depth >= MAX_LOCK_DEPTH)) {
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debug_locks_off();
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printk("BUG: MAX_LOCK_DEPTH too low!\n");
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printk("BUG: MAX_LOCK_DEPTH too low, depth: %i max: %lu!\n",
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curr->lockdep_depth, MAX_LOCK_DEPTH);
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printk("turning off the locking correctness validator.\n");
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lockdep_print_held_locks(current);
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debug_show_all_locks();
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dump_stack();
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return 0;
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}
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