f2fs: Fix the accounting of dcc->undiscard_blks
When a discard_cmd needs to be split due to dpolicy->max_requests, then
for the remaining length it will be either merged into another cmd or a
new discard_cmd will be created. In this case, there is double
accounting of dcc->undiscard_blks for the remaining len, due to which
it shows incorrect value in stats.
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 728ff6e..1c48ec8 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1214,8 +1214,10 @@ static int __submit_discard_cmd(struct f2fs_sb_info *sbi,
len = total_len;
}
- if (!err && len)
+ if (!err && len) {
+ dcc->undiscard_blks -= len;
__update_discard_tree_range(sbi, bdev, lstart, start, len);
+ }
return err;
}