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| author | Ilya Dryomov <idryomov@gmail.com> | 2012-01-16 22:04:48 +0200 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2012-01-16 22:04:48 +0200 |
| commit | 70922617b0099f420deceb53d5dc7f4fb30d08d0 (patch) | |
| tree | 6353dff7355863b92b48001e76c3f00bf180916b /fs | |
| parent | ea67176ae8c024f64d85ec33873e5eadf1af7247 (diff) | |
Btrfs: do not reduce profile in do_chunk_alloc()
Every caller of do_chunk_alloc() feeds it the reduced allocation
profile, so stop trying to reduce it one more time. Instead check the
validity of the passed profile.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/ctree.h | 18 | ||||
| -rw-r--r-- | fs/btrfs/extent-tree.c | 2 |
2 files changed, 19 insertions, 1 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index c4d98c8df5c..1e7aea60da2 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -2536,6 +2536,24 @@ static inline void free_fs_info(struct btrfs_fs_info *fs_info) kfree(fs_info->super_for_commit); kfree(fs_info); } +/** + * profile_is_valid - tests whether a given profile is valid and reduced + * @flags: profile to validate + * @extended: if true @flags is treated as an extended profile + */ +static inline int profile_is_valid(u64 flags, int extended) +{ + u64 mask = ~BTRFS_BLOCK_GROUP_PROFILE_MASK; + + flags &= ~BTRFS_BLOCK_GROUP_TYPE_MASK; + if (extended) + mask &= ~BTRFS_AVAIL_ALLOC_BIT_SINGLE; + + if (flags & mask) + return 0; + /* true if zero or exactly one bit set */ + return (flags & (~flags + 1)) == flags; +} /* root-item.c */ int btrfs_find_root_ref(struct btrfs_root *tree_root, diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 946b0671c5d..a1a18ea7b6c 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -3295,7 +3295,7 @@ static int do_chunk_alloc(struct btrfs_trans_handle *trans, int wait_for_alloc = 0; int ret = 0; - flags = btrfs_reduce_alloc_profile(extent_root, flags); + BUG_ON(!profile_is_valid(flags, 0)); space_info = __find_space_info(extent_root->fs_info, flags); if (!space_info) { |