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f2fs: add a new function get_ssr_cost 

This patch add a new method get_ssr_cost to select
SSR segment more accurately.

Signed-off-by: Yunlei He <heyunlei@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Yunlei He 2017-05-17 17:22:51 +08:00 committed by Jaegeuk Kim
parent bd80a4b981
commit b7b7c4cf1c
1 changed files with 10 additions and 1 deletions
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11
fs/f2fs/gc.c
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@ -258,11 +258,20 @@ static unsigned int get_greedy_cost(struct f2fs_sb_info *sbi,
valid_blocks * 2 : valid_blocks; valid_blocks * 2 : valid_blocks;
} }
static unsigned int get_ssr_cost(struct f2fs_sb_info *sbi,
unsigned int segno)
{
struct seg_entry *se = get_seg_entry(sbi, segno);
return se->ckpt_valid_blocks > se->valid_blocks ?
se->ckpt_valid_blocks : se->valid_blocks;
}
static inline unsigned int get_gc_cost(struct f2fs_sb_info *sbi, static inline unsigned int get_gc_cost(struct f2fs_sb_info *sbi,
unsigned int segno, struct victim_sel_policy *p) unsigned int segno, struct victim_sel_policy *p)
{ {
if (p->alloc_mode == SSR) if (p->alloc_mode == SSR)
return get_seg_entry(sbi, segno)->ckpt_valid_blocks; return get_ssr_cost(sbi, segno);
/* alloc_mode == LFS */ /* alloc_mode == LFS */
if (p->gc_mode == GC_GREEDY) if (p->gc_mode == GC_GREEDY)