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(parent: c3a4689) | patch
Btrfs: fix race when updating existing ref head
authorFilipe Manana <fdmanana@gmail.com>
Fri, 14 Mar 2014 20:55:01 +0000 (20:55 +0000)
committerChris Mason <clm@fb.com>
Fri, 21 Mar 2014 00:15:28 +0000 (17:15 -0700)
commit21543baddcdbaa49db5ac8766ae564381e7c64d9
tree4ce8aee02deb8ed2d37ef08fe7b2bf2ef66eec24tree | snapshot (tar.gz zip)
parentc3a468915a384c0015263edd9b7263775599a323commit | diff
Btrfs: fix race when updating existing ref head

While we update an existing ref head's extent_op, we're not holding
its spinlock, so while we're updating its extent_op contents (key,
flags) we can have a task running __btrfs_run_delayed_refs() that
holds the ref head's lock and sets its extent_op to NULL right after
the task updating the ref head just checked its extent_op was not NULL.

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Chris Mason <clm@fb.com>
fs/btrfs/delayed-ref.c diff | blob | blame | history