Commit b01b4050 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

kvfree_rcu: Use __GFP_NOMEMALLOC for single-argument kvfree_rcu() 



This commit applies the __GFP_NOMEMALLOC gfp flag to memory allocations
carried out by the single-argument variant of kvfree_rcu(), thus avoiding
this can-sleep code path from dipping into the emergency reserves.

Acked-by: default avatarMichal Hocko <mhocko@suse.com>
Suggested-by: default avatarMichal Hocko <mhocko@suse.com>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 148e3731

kernel/rcu/tree.c

+1 −1
Original line number Diff line number Diff line
@@ -3519,7 +3519,7 @@ add_ptr_to_bulk_krc_lock(struct kfree_rcu_cpu **krcp, 
		if (!bnode && can_alloc) {

			krc_this_cpu_unlock(*krcp, *flags);

			bnode = (struct kvfree_rcu_bulk_data *)

				__get_free_page(GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOWARN);

				__get_free_page(GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOMEMALLOC | __GFP_NOWARN);

			*krcp = krc_this_cpu_lock(flags);

		}