Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 9147efcb authored by Eric Dumazet's avatar Eric Dumazet Committed by Alexei Starovoitov
Browse files

bpf: add schedule points to map alloc/free 



While using large percpu maps, htab_map_alloc() can hold
cpu for hundreds of ms.

This patch adds cond_resched() calls to percpu alloc/free
call sites, all running in process context.

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 9dbd2d94

kernel/bpf/hashtab.c

+2 −0
Original line number Diff line number Diff line
@@ -114,6 +114,7 @@ static void htab_free_elems(struct bpf_htab *htab) 
		pptr = htab_elem_get_ptr(get_htab_elem(htab, i),

					 htab->map.key_size);

		free_percpu(pptr);

		cond_resched();

	}

free_elems:

	bpf_map_area_free(htab->elems);
@@ -159,6 +160,7 @@ static int prealloc_init(struct bpf_htab *htab) 
			goto free_elems;

		htab_elem_set_ptr(get_htab_elem(htab, i), htab->map.key_size,

				  pptr);

		cond_resched();

	}



skip_percpu_elems: