[PATCH AUTOSEL 4.18 076/126] f2fs: fix to account IO correctly for cgroup writeback

From: Sasha Levin
Date: Wed Oct 31 2018 - 19:34:51 EST

From: Chao Yu <yuchao0@xxxxxxxxxx>

[ Upstream commit 78efac537de33faab9a4302cc05a70bb4a8b3b63 ]

Now, we have supported cgroup writeback, it depends on correctly IO
account of specified filesystem.

But in commit d1b3e72d5490 ("f2fs: submit bio of in-place-update pages"),
we split write paths from f2fs_submit_page_mbio() to two:
- f2fs_submit_page_bio() for IPU path
- f2fs_submit_page_bio() for OPU path

But still we account write IO only in f2fs_submit_page_mbio(), result in
incorrect IO account, fix it by adding missing IO account in IPU path.

Fixes: d1b3e72d5490 ("f2fs: submit bio of in-place-update pages")
Signed-off-by: Chao Yu <yuchao0@xxxxxxxxxx>
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
fs/f2fs/data.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index b61954d40c25..fa439f5c4d88 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -453,6 +453,10 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio)
return -EFAULT;
+ if (fio->io_wbc && !is_read_io(fio->op))
+ wbc_account_io(fio->io_wbc, page, PAGE_SIZE);
bio_set_op_attrs(bio, fio->op, fio->op_flags);

__submit_bio(fio->sbi, bio, fio->type);