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authorTheodore Ts'o <tytso@mit.edu>2009-03-04 19:09:10 -0500
committerTheodore Ts'o <tytso@mit.edu>2009-03-04 19:09:10 -0500
commit9f24e4208f7ee2748f157368b63287dc903fcf60 (patch)
tree255989fe69ebfb2b031dc7cf6dbe975df67c711a /fs/ext4/balloc.c
parentb713a5ec55bf73c833f9883cdd761b20ee61a1ab (diff)
ext4: Use atomic_t's in struct flex_groups
Reduce pressure on the sb_bgl_lock family of locks by using atomic_t's to track the number of free blocks and inodes in each flex_group. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/balloc.c')
-rw-r--r--fs/ext4/balloc.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index b37b1287558..53c72ad8587 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -470,9 +470,8 @@ void ext4_add_groupblocks(handle_t *handle, struct super_block *sb,
if (sbi->s_log_groups_per_flex) {
ext4_group_t flex_group = ext4_flex_group(sbi, block_group);
- spin_lock(sb_bgl_lock(sbi, flex_group));
- sbi->s_flex_groups[flex_group].free_blocks += blocks_freed;
- spin_unlock(sb_bgl_lock(sbi, flex_group));
+ atomic_add(blocks_freed,
+ &sbi->s_flex_groups[flex_group].free_blocks);
}
/*
* request to reload the buddy with the