diff options
| author | Andreas Dilger <adilger@sun.com> | 2009-06-13 11:45:35 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2009-06-13 11:45:35 -0400 |
| commit | 11013911daea4820147ae6d7094dd7c6894e8651 (patch) | |
| tree | f8e9f9d2058e0dfc826d4df3d88a7eb18a56b3f3 /fs/ext4/super.c | |
| parent | f157a4aa98a18bd3817a72bea90d48494e2586e7 (diff) | |
ext4: teach the inode allocator to use a goal inode number
Enhance the inode allocator to take a goal inode number as a
paremeter; if it is specified, it takes precedence over Orlov or
parent directory inode allocation algorithms.
The extents migration function uses the goal inode number so that the
extent trees allocated the migration function use the correct flex_bg.
In the future, the goal inode functionality will also be used to
allocate an adjacent inode for the extended attributes.
Also, for testing purposes the goal inode number can be specified via
/sys/fs/{dev}/inode_goal. This can be useful for testing inode
allocation beyond 2^32 blocks on very large filesystems.
Signed-off-by: Andreas Dilger <adilger@sun.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/super.c')
| -rw-r--r-- | fs/ext4/super.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 04486a53469..23013d303f8 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -2206,6 +2206,7 @@ EXT4_RO_ATTR(session_write_kbytes); EXT4_RO_ATTR(lifetime_write_kbytes); EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, inode_readahead_blks_store, s_inode_readahead_blks); +EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); @@ -2218,6 +2219,7 @@ static struct attribute *ext4_attrs[] = { ATTR_LIST(session_write_kbytes), ATTR_LIST(lifetime_write_kbytes), ATTR_LIST(inode_readahead_blks), + ATTR_LIST(inode_goal), ATTR_LIST(mb_stats), ATTR_LIST(mb_max_to_scan), ATTR_LIST(mb_min_to_scan), |