diff options
| author | Josef Bacik <jbacik@fb.com> | 2014-12-16 19:54:43 +0300 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2015-01-22 04:35:49 +0300 |
| commit | e7070be198b34c26f39bd9010a29ce6462dc4f3e (patch) | |
| tree | a51e6fa1170a2a5b3a3c0aa3e38626287904070f /fs/btrfs/ctree.h | |
| parent | ec6f34e5b552fb0a52e6aae1a5afbbb1605cc6cc (diff) | |
| download | linux-e7070be198b34c26f39bd9010a29ce6462dc4f3e.tar.xz | |
Btrfs: change how we track dirty roots
I've been overloading root->dirty_list to keep track of dirty roots and which
roots need to have their commit roots switched at transaction commit time. This
could cause us to lose an update to the root which could corrupt the file
system. To fix this use a state bit to know if the root is dirty, and if it
isn't set we go ahead and move the root to the dirty list. This way if we
re-dirty the root after adding it to the switch_commit list we make sure to
update it. This also makes it so that the extent root is always the last root
on the dirty list to try and keep the amount of churn down at this point in the
commit. Thanks,
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 7e607416755a..45ed4dc6a0ce 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -1775,6 +1775,7 @@ struct btrfs_subvolume_writers { #define BTRFS_ROOT_DEFRAG_RUNNING 6 #define BTRFS_ROOT_FORCE_COW 7 #define BTRFS_ROOT_MULTI_LOG_TASKS 8 +#define BTRFS_ROOT_DIRTY 9 /* * in ram representation of the tree. extent_root is used for all allocations |