On Tue, Apr 03, 2018 at 10:22:53AM -0700, rao.sho...@oracle.com wrote:
> +++ b/mm/slab.h
> @@ -80,6 +80,29 @@ extern const struct kmalloc_info_struct {
> unsigned long size;
> } kmalloc_info[];
>
> +#define RCU_MAX_ACCUMULATE_SIZE 25
> +
> +struct rcu_bulk_free_container {
> + struct rcu_head rbfc_rcu;
> + int rbfc_entries;
> + void *rbfc_data[RCU_MAX_ACCUMULATE_SIZE];
> + struct rcu_bulk_free *rbfc_rbf;
> +};
> +
> +struct rcu_bulk_free {
> + struct rcu_head rbf_rcu; /* used to schedule monitor process */
> + spinlock_t rbf_lock;
> + struct rcu_bulk_free_container *rbf_container;
> + struct rcu_bulk_free_container *rbf_cached_container;
> + struct rcu_head *rbf_list_head;
> + int rbf_list_size;
> + int rbf_cpu;
> + int rbf_empty;
> + int rbf_polled;
> + bool rbf_init;
> + bool rbf_monitor;
> +};
I think you might be better off with an IDR. The IDR can always
contain one entry, so there's no need for this 'rbf_list_head' or
__rcu_bulk_schedule_list. The IDR contains its first 64 entries in
an array (if that array can be allocated), so it's compatible with the
kfree_bulk() interface.
