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| author | Yan Zheng <zheng.yan@oracle.com> | 2008-10-30 14:20:02 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-10-30 14:20:02 -0400 |
| commit | 80ff385665b7fca29fefe358a60ab0d09f9b8e87 (patch) | |
| tree | 8a801d3f268d289b62f8dac87df8b757fb3b19d4 /fs/btrfs/ioctl.c | |
| parent | 6643558db29006825dbb10012b3f8890aca4bcd5 (diff) | |
| download | linux-3.10-80ff385665b7fca29fefe358a60ab0d09f9b8e87.tar.gz linux-3.10-80ff385665b7fca29fefe358a60ab0d09f9b8e87.tar.bz2 linux-3.10-80ff385665b7fca29fefe358a60ab0d09f9b8e87.zip | |
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>
Diffstat (limited to 'fs/btrfs/ioctl.c')
| -rw-r--r-- | fs/btrfs/ioctl.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index fd3c8b5676c..7f915d47839 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -112,6 +112,7 @@ static noinline int create_subvol(struct btrfs_root *root, btrfs_set_root_level(&root_item, 0); btrfs_set_root_refs(&root_item, 1); btrfs_set_root_used(&root_item, 0); + btrfs_set_root_last_snapshot(&root_item, 0); memset(&root_item.drop_progress, 0, sizeof(root_item.drop_progress)); root_item.drop_level = 0; |