Zhaolei 166f66d0bc btrfs: Add WARN_ON() for double lock in btrfs_tree_lock() ...

When a task trying to double lock a extent buffer, there are no
lockdep warning about it because this lock may be in "blocking_lock"
state, and make us hard to debug.

This patch add a WARN_ON() for above condition, it can not report
all deadlock cases(as lock between tasks), but at least helps us
some.

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>

2015-08-09 07:07:14 -07:00

8.1 KiB

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