diff options
Diffstat (limited to 'fs/ext4/ext4.h')
| -rw-r--r-- | fs/ext4/ext4.h | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 2a7e254cbae3..914475cbb060 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -128,6 +128,23 @@ enum SHIFT_DIRECTION { }; /* + * Number of criterias defined. For each criteria, mballoc has slightly + * different way of finding the required blocks nad usually, higher the + * criteria the slower the allocation. We start at lower criterias and keep + * falling back to higher ones if we are not able to find any blocks. + */ +#define EXT4_MB_NUM_CRS 4 +/* + * All possible allocation criterias for mballoc + */ +enum criteria { + CR0, + CR1, + CR2, + CR3, +}; + +/* * Flags used in mballoc's allocation_context flags field. * * Also used to show what's going on for debugging purposes when the @@ -1544,9 +1561,9 @@ struct ext4_sb_info { atomic_t s_bal_2orders; /* 2^order hits */ atomic_t s_bal_cr0_bad_suggestions; atomic_t s_bal_cr1_bad_suggestions; - atomic64_t s_bal_cX_groups_considered[4]; - atomic64_t s_bal_cX_hits[4]; - atomic64_t s_bal_cX_failed[4]; /* cX loop didn't find blocks */ + atomic64_t s_bal_cX_groups_considered[EXT4_MB_NUM_CRS]; + atomic64_t s_bal_cX_hits[EXT4_MB_NUM_CRS]; + atomic64_t s_bal_cX_failed[EXT4_MB_NUM_CRS]; /* cX loop didn't find blocks */ atomic_t s_mb_buddies_generated; /* number of buddies generated */ atomic64_t s_mb_generation_time; atomic_t s_mb_lost_chunks; |