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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2008-10-16 10:14:27 -0400
committerTheodore Ts'o <tytso@mit.edu>2008-10-16 10:14:27 -0400
commitc894058d66637c7720569fbe12957f4de64d9991 (patch)
treef13472d7fd76155f1365550515997a24aff611c9 /fs/ext4/mballoc.h
parentc2774d84fd6cab2bfa2a2fae0b1ca8d8ebde48a2 (diff)
downloadop-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.h26
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;
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