On Tue, May 29, 2018 at 05:17:17PM -0400, Josef Bacik wrote: > @@ -1099,6 +1099,11 @@ struct task_struct { > unsigned int memcg_nr_pages_over_high; > #endif > > +#ifdef CONFIG_BLK_CGROUP > + struct request_queue *throttle_queue; > + bool use_memdelay; > +#endif Since you only touch use_memdelay from current, you can make this a single bit and pack it with the other task flags farther up; memcg_may_oom, no_cgroup_migration and friends.