Btrfs: Use mutex_lock_nested for tree locking

Browse source

Lockdep has the notion of locking subclasses so that you can identify
locks you expect to be taken after other locks of the same class.  This
changes the per-extent buffer btree locking routines to use a subclass based
on the level in the tree.

Unfortunately, lockdep can only handle 8 total subclasses, and the btrfs
max level is also 8.  So when lockdep is on, use a lower max level.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

...

This commit is contained in:

Chris Mason 2008-07-22 11:18:09 -04:00

parent f421950f86

commit 6dddcbeb28

2 changed files with 6 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

6

fs/btrfs/ctree.h

View file

2

fs/btrfs/locking.c

View file