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ext4: Use atomic_t's in struct flex_groups

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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>
This commit is contained in:
Theodore Ts'o
2009-03-04 19:09:10 -05:00
parent b713a5ec55
commit 9f24e4208f
6 changed files with 30 additions and 37 deletions
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4
fs/ext4/ext4.h
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@@ -170,8 +170,8 @@ struct ext4_group_desc
*/
struct flex_groups {
__u32 free_inodes;
__u32 free_blocks;
atomic_t free_inodes;
atomic_t free_blocks;
};
#define EXT4_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */