tree 8a801d3f268d289b62f8dac87df8b757fb3b19d4
parent 6643558db29006825dbb10012b3f8890aca4bcd5
author Yan Zheng <zheng.yan@oracle.com> 1225390802 -0400
committer Chris Mason <chris.mason@oracle.com> 1225390802 -0400

Btrfs: update nodatacow code v2

This patch simplifies the nodatacow checker. If all references
were created after the latest snapshot, then we can avoid COW
safely. This patch also updates run_delalloc_nocow to do more
fine-grained checking.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>