tree 233033cf8c7f3cb38dc549d2a1be7f0fc9ecfd80
parent 56d2a48f81a1bde827c625b90221fade72fe9c61
author Chris Mason <chris.mason@oracle.com> 1320567979 -0500
committer Chris Mason <chris.mason@oracle.com> 1320567979 -0500

Btrfs: fix race during transaction joins

While we're allocating ram for a new transaction, we drop our spinlock.
When we get the lock back, we do check to see if a transaction started
while we slept, but we don't check to make sure it isn't blocked
because a commit has already started.

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