-From: Shaohua Li <shli@fb.com>
-
-Basically this is a copy of commit 001e4a8775f6(ext4: implement cgroup
-writeback support). Tested with a fio test, verified writeback is
-throttled against cgroup io.max write bandwidth, also verified moving
-the fio test to another cgroup and the writeback is throttled against
-new cgroup setting.
-
-Cc: Tejun Heo <tj@kernel.org>
-Signed-off-by: Shaohua Li <shli@fb.com>
----
- fs/xfs/xfs_aops.c | 2 ++
- fs/xfs/xfs_super.c | 1 +
- 2 files changed, 3 insertions(+)
-
---- linux-4.19/fs/xfs/xfs_aops.c.org 2018-11-21 10:31:12.348955352 +0100
-+++ linux-4.19/fs/xfs/xfs_aops.c 2018-11-21 10:34:35.241764742 +0100
-@@ -613,8 +613,10 @@ xfs_add_to_ioend(
- list_add(&wpc->ioend->io_list, iolist);
- wpc->ioend = xfs_alloc_ioend(inode, wpc->io_type, offset,
- bdev, sector);
-+ wbc_init_bio(wbc, wpc->ioend->io_bio);
- }
-
-+ wbc_account_io(wbc, page, len);
- if (!__bio_try_merge_page(wpc->ioend->io_bio, page, len, poff)) {
- if (iop)
- atomic_inc(&iop->write_count);
-diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
-index 584cf2d..aea3bc2 100644
---- a/fs/xfs/xfs_super.c
-+++ b/fs/xfs/xfs_super.c
-@@ -1634,6 +1634,7 @@ xfs_fs_fill_super(
- sb->s_max_links = XFS_MAXLINK;
- sb->s_time_gran = 1;
- set_posix_acl_flag(sb);
-+ sb->s_iflags |= SB_I_CGROUPWB;
-
- /* version 5 superblocks support inode version counters. */
- if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)
+;
+;