f2fs: implement cgroup writeback support
authorYufen Yu <yuyufen@huawei.com>
Tue, 9 Jan 2018 11:33:39 +0000 (19:33 +0800)
committerJaegeuk Kim <jaegeuk@kernel.org>
Tue, 16 Jan 2018 23:40:01 +0000 (15:40 -0800)
commit578c647879f74c333d20762375fd970907f2e97c
treef210806961bad512719f9e9d94cea6826a9e86c2
parentbffa8d3b0040446f18961ab7de8e73fdca7fe4f0
f2fs: implement cgroup writeback support

Cgroup writeback requires explicit support from the filesystem.
f2fs's data and node writeback IOs go through __write_data_page,
which sets fio for submiting IOs. So, we add io_wbc for fio,
associate bios with blkcg by invoking wbc_init_bio() and
account IOs issuing by wbc_account_io().
In addtion, f2fs_fill_super() is updated to set SB_I_CGROUPWB.

Meta writeback IOs is left alone by this patch and will always be
attributed to the root cgroup.

The results show that f2fs can throttle writeback nicely for
data writing and file creating.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Yufen Yu <yuyufen@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
fs/f2fs/data.c
fs/f2fs/f2fs.h
fs/f2fs/node.c
fs/f2fs/super.c