On Fri 22-05-15 17:13:56, Tejun Heo wrote:
> wakeup_dirtytime_writeback() currently only starts writeback on the
> root wb (bdi_writeback).  For cgroup writeback support, update the
> function to check all wbs.
> 
> Signed-off-by: Tejun Heo <[email protected]>
> Cc: Jens Axboe <[email protected]>
> Cc: Jan Kara <[email protected]>
> Cc: Theodore Ts'o <[email protected]>

Looks good. You can add:

Reviewed-by: Jan Kara <[email protected]>

                                                                Honza

> ---
>  fs/fs-writeback.c | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
> index 508e10c..8ae212e 100644
> --- a/fs/fs-writeback.c
> +++ b/fs/fs-writeback.c
> @@ -1260,9 +1260,12 @@ static void wakeup_dirtytime_writeback(struct 
> work_struct *w)
>  
>       rcu_read_lock();
>       list_for_each_entry_rcu(bdi, &bdi_list, bdi_list) {
> -             if (list_empty(&bdi->wb.b_dirty_time))
> -                     continue;
> -             wb_wakeup(&bdi->wb);
> +             struct bdi_writeback *wb;
> +             struct wb_iter iter;
> +
> +             bdi_for_each_wb(wb, bdi, &iter, 0)
> +                     if (!list_empty(&bdi->wb.b_dirty_time))
> +                             wb_wakeup(&bdi->wb);
>       }
>       rcu_read_unlock();
>       schedule_delayed_work(&dirtytime_work, dirtytime_expire_interval * HZ);
> -- 
> 2.4.0
> 
-- 
Jan Kara <[email protected]>
SUSE Labs, CR
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