On 2021/9/3 1:24, Daeho Jeong wrote:
@@ -2630,6 +2631,8 @@ static unsigned int __get_next_segno(struct f2fs_sb_info
*sbi, int type)
unsigned short seg_type = curseg->seg_type;
sanity_check_seg_type(sbi, seg_type);
+ if (f2fs_need_rand_seg(sbi))
+ return prandom_u32() % (MAIN_SECS(sbi) * sbi->segs_per_sec);
if (f2fs_need_seq_seg(sbi))
return 0;
static inline bool f2fs_need_seq_seg(struct f2fs_sb_info *sbi)
{
return F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_FIXED_BLK;
}
@@ -2707,12 +2715,29 @@ static int __next_free_blkoff(struct f2fs_sb_info *sbi,
static void __refresh_next_blkoff(struct f2fs_sb_info *sbi,
struct curseg_info *seg)
{
- if (seg->alloc_type == SSR)
+ if (seg->alloc_type == SSR) {
seg->next_blkoff =
__next_free_blkoff(sbi, seg->segno,
seg->next_blkoff + 1);
- else
+ } else {
seg->next_blkoff++;
+ if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_FIXED_BLK) {
+ if (--seg->fragment_remained_chunk <= 0) {
+ seg->fragment_remained_chunk =
+ sbi->fragment_chunk_size;
+ seg->next_blkoff +=
+ sbi->fragment_hole_size;
One more concern... we'd better to save fragment_remained_hole as well
as fragment_remained_chunk, otherwise, if fragment_chunk_size +
fragment_hole_size > 512, fragment hole will be truncated to 512 -
fragment_chunk_size due to we won't create hole with enough size as
seg->next_blkoff has crossed end of current segment.
Thanks,
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