From c894058d66637c7720569fbe12957f4de64d9991 Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Thu, 16 Oct 2008 10:14:27 -0400 Subject: 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 Signed-off-by: Theodore Ts'o --- fs/ext4/mballoc.h | 26 ++++++++++++++++---------- 1 file changed, 16 insertions(+), 10 deletions(-) (limited to 'fs/ext4/mballoc.h') diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h index b3b4828f8b89..9e815c4e37df 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; -- cgit v1.2.3