From: Alexei Starovoitov <ast@xxxxxxxxxx>
alloc_bulk() can reuse elements from free_by_rcu_ttrace.
Let it reuse from waiting_for_gp_ttrace as well to avoid unnecessary kmalloc().
Signed-off-by: Alexei Starovoitov <ast@xxxxxxxxxx>
---
kernel/bpf/memalloc.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/kernel/bpf/memalloc.c b/kernel/bpf/memalloc.c
index 8b7645bffd1a..10d027674743 100644
--- a/kernel/bpf/memalloc.c
+++ b/kernel/bpf/memalloc.c
@@ -202,6 +202,15 @@ static void alloc_bulk(struct bpf_mem_cache *c, int cnt, int node)
if (i >= cnt)
return;
+ for (; i < cnt; i++) {
+ obj = llist_del_first(&c->waiting_for_gp_ttrace);
+ if (!obj)
+ break;
+ add_obj_to_free_list(c, obj);
+ }
+ if (i >= cnt)
+ return;
+
memcg = get_memcg(c);
old_memcg = set_active_memcg(memcg);
for (; i < cnt; i++) {
--
2.34.1
