[PATCH 6.0 0661/1073] f2fs: fix iostat parameter for discard

Greg Kroah-Hartman
2022-12-28T16:18:15Z

From: Yangtao Li <frank.li@vivo.com>

[ Upstream commit 15e38ee44d50cad264da80ef75626b9224ddc4a3 ]

Just like other data we count uses the number of bytes as the basic unit,
but discard uses the number of cmds as the statistical unit. In fact the
discard command contains the number of blocks, so let's change to the
number of bytes as the base unit.

Fixes: b0af6d491a6b ("f2fs: add app/fs io stat")
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 27690f757913..2afed479160b 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1171,7 +1171,7 @@ static int __submit_discard_cmd(struct f2fs_sb_info *sbi,

atomic_inc(&dcc->issued_discard);

- f2fs_update_iostat(sbi, FS_DISCARD, 1);
+ f2fs_update_iostat(sbi, FS_DISCARD, len * F2FS_BLKSIZE);

lstart += len;
start += len;
--
2.35.1