EXT4_MB_NUM_CRS
};
-/* criteria below which we use fast block scanning and avoid unnecessary IO */
-#define CR_FAST CR_GOAL_LEN_SLOW
-
/*
* Flags used in mballoc's allocation_context flags field.
*
extern void ext4_process_freed_data(struct super_block *sb, tid_t commit_tid);
extern void ext4_mb_mark_bb(struct super_block *sb, ext4_fsblk_t block,
int len, int state);
+static inline bool ext4_mb_cr_expensive(enum criteria cr)
+{
+ return cr >= CR_GOAL_LEN_SLOW;
+}
/* inode.c */
void ext4_inode_csum_set(struct inode *inode, struct ext4_inode *raw,
break;
}
- if (ac->ac_criteria < CR_FAST) {
+ if (!ext4_mb_cr_expensive(ac->ac_criteria)) {
/*
* In CR_GOAL_LEN_FAST and CR_BEST_AVAIL_LEN, we are
* sure that this group will have a large enough
free = grp->bb_free;
if (free == 0)
goto out;
- if (cr <= CR_FAST && free < ac->ac_g_ex.fe_len)
+ /*
+ * In all criterias except CR_ANY_FREE we try to avoid groups that
+ * can't possibly satisfy the full goal request due to insufficient
+ * free blocks.
+ */
+ if (cr < CR_ANY_FREE && free < ac->ac_g_ex.fe_len)
goto out;
if (unlikely(EXT4_MB_GRP_BBITMAP_CORRUPT(grp)))
goto out;
* sure we locate metadata blocks in the first block group in
* the flex_bg if possible.
*/
- if (cr < CR_FAST &&
+ if (!ext4_mb_cr_expensive(cr) &&
(!sbi->s_log_groups_per_flex ||
((group & ((1 << sbi->s_log_groups_per_flex) - 1)) != 0)) &&
!(ext4_has_group_desc_csum(sb) &&
* spend a lot of time loading imperfect groups
*/
if ((prefetch_grp == group) &&
- (cr >= CR_FAST ||
+ (ext4_mb_cr_expensive(cr) ||
prefetch_ios < sbi->s_mb_prefetch_limit)) {
nr = sbi->s_mb_prefetch;
if (ext4_has_feature_flex_bg(sb)) {