• Yufen Yu's avatar
    f2fs: implement cgroup writeback support · 578c6478
    Yufen Yu authored
    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: default avatarChao Yu <yuchao0@huawei.com>
    Signed-off-by: default avatarYufen Yu <yuyufen@huawei.com>
    Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
    578c6478
data.c 55.1 KB