diff options
author | Li Zefan <lizefan@huawei.com> | 2012-07-09 20:21:07 -0600 |
---|---|---|
committer | Chris Mason <chris.mason@fusionio.com> | 2012-07-23 16:28:05 -0400 |
commit | b4d7c3c9456a311a45bc1ef8944b5ba5b176244f (patch) | |
tree | 217aeddfbcd502d8b61400cc0d87603f03c836f6 /fs/btrfs | |
parent | d5b025d510664382f9a197f7e7fb9fc60fe209bc (diff) | |
download | talos-op-linux-b4d7c3c9456a311a45bc1ef8944b5ba5b176244f.tar.gz talos-op-linux-b4d7c3c9456a311a45bc1ef8944b5ba5b176244f.zip |
Btrfs: kill free_space pointer from inode structure
Inodes always allocate free space with BTRFS_BLOCK_GROUP_DATA type,
which means every inode has the same BTRFS_I(inode)->free_space pointer.
This shrinks struct btrfs_inode by 4 bytes (or 8 bytes on 64 bits).
Signed-off-by: Li Zefan <lizefan@huawei.com>
Diffstat (limited to 'fs/btrfs')
-rw-r--r-- | fs/btrfs/btrfs_inode.h | 3 | ||||
-rw-r--r-- | fs/btrfs/ctree.h | 3 | ||||
-rw-r--r-- | fs/btrfs/extent-tree.c | 20 | ||||
-rw-r--r-- | fs/btrfs/inode.c | 3 |
4 files changed, 10 insertions, 19 deletions
diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h index 21b8cfe08e95..5b2ad6bc4fe7 100644 --- a/fs/btrfs/btrfs_inode.h +++ b/fs/btrfs/btrfs_inode.h @@ -87,9 +87,6 @@ struct btrfs_inode { /* node for the red-black tree that links inodes in subvolume root */ struct rb_node rb_node; - /* the space_info for where this inode's data allocations are done */ - struct btrfs_space_info *space_info; - unsigned long runtime_flags; /* full 64 bit generation number, struct vfs_inode doesn't have a big diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index fa5c45b39075..6761490b91cd 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -1240,6 +1240,8 @@ struct btrfs_fs_info { */ struct list_head space_info; + struct btrfs_space_info *data_sinfo; + struct reloc_control *reloc_ctl; spinlock_t delalloc_lock; @@ -2607,7 +2609,6 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 group_start); u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags); u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data); -void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde); void btrfs_clear_space_info_full(struct btrfs_fs_info *info); int btrfs_check_data_free_space(struct inode *inode, u64 bytes); void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes); diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 7843542484c9..6621ed72f3c3 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -3139,6 +3139,8 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags, init_waitqueue_head(&found->wait); *space_info = found; list_add_rcu(&found->list, &info->space_info); + if (flags & BTRFS_BLOCK_GROUP_DATA) + info->data_sinfo = found; return 0; } @@ -3268,12 +3270,6 @@ u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data) return get_alloc_profile(root, flags); } -void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *inode) -{ - BTRFS_I(inode)->space_info = __find_space_info(root->fs_info, - BTRFS_BLOCK_GROUP_DATA); -} - /* * This will check the space that the inode allocates from to make sure we have * enough space for bytes. @@ -3282,6 +3278,7 @@ int btrfs_check_data_free_space(struct inode *inode, u64 bytes) { struct btrfs_space_info *data_sinfo; struct btrfs_root *root = BTRFS_I(inode)->root; + struct btrfs_fs_info *fs_info = root->fs_info; u64 used; int ret = 0, committed = 0, alloc_chunk = 1; @@ -3294,7 +3291,7 @@ int btrfs_check_data_free_space(struct inode *inode, u64 bytes) committed = 1; } - data_sinfo = BTRFS_I(inode)->space_info; + data_sinfo = fs_info->data_sinfo; if (!data_sinfo) goto alloc; @@ -3335,10 +3332,9 @@ alloc: goto commit_trans; } - if (!data_sinfo) { - btrfs_set_inode_space_info(root, inode); - data_sinfo = BTRFS_I(inode)->space_info; - } + if (!data_sinfo) + data_sinfo = fs_info->data_sinfo; + goto again; } @@ -3385,7 +3381,7 @@ void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes) /* make sure bytes are sectorsize aligned */ bytes = (bytes + root->sectorsize - 1) & ~((u64)root->sectorsize - 1); - data_sinfo = BTRFS_I(inode)->space_info; + data_sinfo = root->fs_info->data_sinfo; spin_lock(&data_sinfo->lock); data_sinfo->bytes_may_use -= bytes; trace_btrfs_space_reservation(root->fs_info, "space_info", diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 321c415dea7f..ee45ebf42192 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -4082,7 +4082,6 @@ static int btrfs_init_locked_inode(struct inode *inode, void *p) struct btrfs_iget_args *args = p; inode->i_ino = args->ino; BTRFS_I(inode)->root = args->root; - btrfs_set_inode_space_info(args->root, inode); return 0; } @@ -4667,7 +4666,6 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans, BTRFS_I(inode)->root = root; BTRFS_I(inode)->generation = trans->transid; inode->i_generation = BTRFS_I(inode)->generation; - btrfs_set_inode_space_info(root, inode); if (S_ISDIR(mode)) owner = 0; @@ -6944,7 +6942,6 @@ struct inode *btrfs_alloc_inode(struct super_block *sb) return NULL; ei->root = NULL; - ei->space_info = NULL; ei->generation = 0; ei->last_trans = 0; ei->last_sub_trans = 0; |