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| author |   Filipe Manana <fdmanana@suse.com> | 2015-06-09 17:48:21 +0100 |
|---|---|---|
| committer |   Chris Mason <clm@fb.com> | 2015-06-10 07:02:46 -0700 |
| commit | 4617ea3a52cfe8ae407ef406ab999f40a558c369 (patch) | |
| tree | 12f1391feee7674ed4d411ae71a0bd1c4ffb20c6 /fs/btrfs/volumes.c | |
| parent | Btrfs: don't attach unnecessary extents to transaction on fsync (diff) | |
| download | linux-dev-4617ea3a52cfe8ae407ef406ab999f40a558c369.tar.xz linux-dev-4617ea3a52cfe8ae407ef406ab999f40a558c369.zip | |
Btrfs: fix necessary chunk tree space calculation when allocating a chunk
When allocating a new chunk or removing one we need to update num_devs
device items and insert or remove a chunk item in the chunk tree, so
in the worst case the space needed in the chunk space_info is:
btrfs_calc_trunc_metadata_size(chunk_root, num_devs) +
btrfs_calc_trans_metadata_size(chunk_root, 1)
That is, in the worst case we need to cow num_devs paths and cow 1 other
path that can result in splitting every node and leaf, and each path
consisting of BTRFS_MAX_LEVEL - 1 nodes and 1 leaf. We were requiring
some additional chunk_root->nodesize * BTRFS_MAX_LEVEL * num_devs bytes,
which were unnecessary since updating the existing device items does
not result in splitting the nodes and leaf since after updating them
they remain with the same size.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/volumes.c')
| -rw-r--r-- | fs/btrfs/volumes.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index d7668756b9d0..c208d6a4dddb 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -2626,7 +2626,7 @@ int btrfs_remove_chunk(struct btrfs_trans_handle *trans, } map = (struct map_lookup *)em->bdev; lock_chunks(root->fs_info->chunk_root); - check_system_chunk(trans, extent_root, map->type, false); + check_system_chunk(trans, extent_root, map->type); unlock_chunks(root->fs_info->chunk_root); for (i = 0; i < map->num_stripes; i++) { |