From b7b7c4cf1c9ef0272a65f1480457cbfdadcda19d Mon Sep 17 00:00:00 2001
From: Yunlei He <heyunlei@huawei.com>
Date: Wed, 17 May 2017 17:22:51 +0800
Subject: [PATCH] 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>
---
fs/f2fs/gc.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 14c71ac760621..81392970fb2da 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -258,11 +258,20 @@ static unsigned int get_greedy_cost(struct f2fs_sb_info *sbi,
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,
unsigned int segno, struct victim_sel_policy *p)
{
if (p->alloc_mode == SSR)
- return get_seg_entry(sbi, segno)->ckpt_valid_blocks;
+ return get_ssr_cost(sbi, segno);
/* alloc_mode == LFS */
if (p->gc_mode == GC_GREEDY)
--
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