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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2008-10-16 10:14:27 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2008-10-16 10:14:27 -0400 |
| commit | c894058d66637c7720569fbe12957f4de64d9991 (patch) | |
| tree | f13472d7fd76155f1365550515997a24aff611c9 /fs/ext4/mballoc.h | |
| parent | c2774d84fd6cab2bfa2a2fae0b1ca8d8ebde48a2 (diff) | |
| download | op-kernel-dev-c894058d66637c7720569fbe12957f4de64d9991.zip op-kernel-dev-c894058d66637c7720569fbe12957f4de64d9991.tar.gz | |
ext4: Use an rbtree for tracking blocks freed during transaction.
With this patch we track the block freed during a transaction using
red-black tree. We also make sure contiguous blocks freed are collected
in one node in the tree.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/mballoc.h')
| -rw-r--r-- | fs/ext4/mballoc.h | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h index b3b4828..9e815c4 100644 --- a/fs/ext4/mballoc.h +++ b/fs/ext4/mballoc.h @@ -98,23 +98,29 @@ static struct kmem_cache *ext4_pspace_cachep; static struct kmem_cache *ext4_ac_cachep; +static struct kmem_cache *ext4_free_ext_cachep; -#ifdef EXT4_BB_MAX_BLOCKS -#undef EXT4_BB_MAX_BLOCKS -#endif -#define EXT4_BB_MAX_BLOCKS 30 +struct ext4_free_data { + /* this links the free block information from group_info */ + struct rb_node node; -struct ext4_free_metadata { - ext4_group_t group; - unsigned short num; - ext4_grpblk_t blocks[EXT4_BB_MAX_BLOCKS]; + /* this links the free block information from ext4_sb_info */ struct list_head list; + + /* group which free block extent belongs */ + ext4_group_t group; + + /* free block extent */ + ext4_grpblk_t start_blk; + ext4_grpblk_t count; + + /* transaction which freed this extent */ + tid_t t_tid; }; struct ext4_group_info { unsigned long bb_state; - unsigned long bb_tid; - struct ext4_free_metadata *bb_md_cur; + struct rb_root bb_free_root; unsigned short bb_first_free; unsigned short bb_free; unsigned short bb_fragments; |
