[PATCH net-next] net: pin system percpu page_pools to the corresponding NUMA nodes

[Alexander Lobakin]

System page_pools are percpu and one instance can be used only on
one CPU.
%NUMA_NO_NODE is fine for allocating pages, as the PP core always
allocates local pages in this case. But for the struct &page_pool
itself, this node ID means they are allocated on the boot CPU,
which may belong to a different node than the target CPU.
Pin system page_pools to the corresponding nodes when creating,
so that all the allocated data will always be local. Use
cpu_to_mem() to account memless nodes.
Nodes != 0 win some Kpps when testing with xdp-trafficgen.

Signed-off-by: Alexander Lobakin <aleksander.lobakin@xxxxxxxxx>
---
 net/core/dev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 9a67003e49db..fefa484d715a 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -11712,7 +11712,7 @@ static int net_page_pool_create(int cpuid)
 	struct page_pool_params page_pool_params = {
 		.pool_size = SYSTEM_PERCPU_PAGE_POOL_SIZE,
 		.flags = PP_FLAG_SYSTEM_POOL,
-		.nid = NUMA_NO_NODE,
+		.nid = cpu_to_mem(cpuid),
 	};
 	struct page_pool *pp_ptr;
 
-- 
2.44.0