diff options
Diffstat (limited to 'fs/ext4/mballoc.h')
| -rw-r--r-- | fs/ext4/mballoc.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h index 68111a10cfee..02585e3cbcad 100644 --- a/fs/ext4/mballoc.h +++ b/fs/ext4/mballoc.h @@ -79,6 +79,18 @@ #define MB_DEFAULT_MAX_INODE_PREALLOC 512 /* + * Number of groups to search linearly before performing group scanning + * optimization. + */ +#define MB_DEFAULT_LINEAR_LIMIT 4 + +/* + * Minimum number of groups that should be present in the file system to perform + * group scanning optimizations. + */ +#define MB_DEFAULT_LINEAR_SCAN_THRESHOLD 16 + +/* * Number of valid buddy orders */ #define MB_NUM_ORDERS(sb) ((sb)->s_blocksize_bits + 2) @@ -166,11 +178,14 @@ struct ext4_allocation_context { /* copy of the best found extent taken before preallocation efforts */ struct ext4_free_extent ac_f_ex; + ext4_group_t ac_last_optimal_group; + __u32 ac_groups_considered; + __u32 ac_flags; /* allocation hints */ __u16 ac_groups_scanned; + __u16 ac_groups_linear_remaining; __u16 ac_found; __u16 ac_tail; __u16 ac_buddy; - __u16 ac_flags; /* allocation hints */ __u8 ac_status; __u8 ac_criteria; __u8 ac_2order; /* if request is to allocate 2^N blocks and |