From e3fb1b794b5f0c9f9b65707ce4e6be264a9c60f8 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Mon, 27 Oct 2014 13:54:27 -0700 Subject: [PATCH] f2fs: do not discard data protected by the previous checkpoint We should not discard any data protected by the previous checkpoint all the time. Signed-off-by: Jaegeuk Kim --- fs/f2fs/segment.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index d391a5913c79..06dda733f958 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -517,7 +517,7 @@ static void add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc) /* SIT_VBLOCK_MAP_SIZE should be multiple of sizeof(unsigned long) */ for (i = 0; i < entries; i++) - dmap[i] = (cur_map[i] ^ ckpt_map[i]) & ckpt_map[i]; + dmap[i] = ~(cur_map[i] | ckpt_map[i]); while (force || SM_I(sbi)->nr_discards <= SM_I(sbi)->max_discards) { start = __find_rev_next_bit(dmap, max_blocks, end + 1);