tree 1b7863325fbc937cc13c6439824a7d1b80537ea0
parent dc4103f933291cb1a2e6742c4db432e6ed337bae
author Wang Shilong <wangsl.fnst@cn.fujitsu.com> 1388034650 +0800
committer Chris Mason <clm@fb.com> 1390944013 -0800

Btrfs: fix an oops when we fail to merge reloc roots

Previously, we will free reloc root memory and then force filesystem
to be readonly. The problem is that there may be another thread commiting
transaction which will try to access freed reloc root during merging reloc
roots process.

To keep consistency snapshots shared space, we should allow snapshot
finished if possible, so here we don't free reloc root memory.

signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>