netdev - [PATCH bpf-next v3 09/29] bpf: memcg-based memory accounting for bpf ringbuffer

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Date:   Thu, 30 Jul 2020 14:22:50 -0700
From:   Roman Gushchin <guro@...com>
To:     <bpf@...r.kernel.org>
CC:     <netdev@...r.kernel.org>, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>, <kernel-team@...com>,
        <linux-kernel@...r.kernel.org>, Roman Gushchin <guro@...com>,
        Song Liu <songliubraving@...com>
Subject: [PATCH bpf-next v3 09/29] bpf: memcg-based memory accounting for bpf ringbuffer

Enable the memcg-based memory accounting for the memory used by
the bpf ringbuffer.

Signed-off-by: Roman Gushchin <guro@...com>
Acked-by: Song Liu <songliubraving@...com>
---
 kernel/bpf/ringbuf.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/kernel/bpf/ringbuf.c b/kernel/bpf/ringbuf.c
index 002f8a5c9e51..e8e2c39cbdc9 100644
--- a/kernel/bpf/ringbuf.c
+++ b/kernel/bpf/ringbuf.c
@@ -60,8 +60,8 @@ struct bpf_ringbuf_hdr {
 
 static struct bpf_ringbuf *bpf_ringbuf_area_alloc(size_t data_sz, int numa_node)
 {
-	const gfp_t flags = GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOWARN |
-			    __GFP_ZERO;
+	const gfp_t flags = GFP_KERNEL_ACCOUNT | __GFP_RETRY_MAYFAIL |
+			    __GFP_NOWARN | __GFP_ZERO;
 	int nr_meta_pages = RINGBUF_PGOFF + RINGBUF_POS_PAGES;
 	int nr_data_pages = data_sz >> PAGE_SHIFT;
 	int nr_pages = nr_meta_pages + nr_data_pages;
@@ -89,7 +89,8 @@ static struct bpf_ringbuf *bpf_ringbuf_area_alloc(size_t data_sz, int numa_node)
 	 */
 	array_size = (nr_meta_pages + 2 * nr_data_pages) * sizeof(*pages);
 	if (array_size > PAGE_SIZE)
-		pages = vmalloc_node(array_size, numa_node);
+		pages = __vmalloc_node(array_size, 1, GFP_KERNEL_ACCOUNT,
+				       numa_node, __builtin_return_address(0));
 	else
 		pages = kmalloc_node(array_size, flags, numa_node);
 	if (!pages)
@@ -167,7 +168,7 @@ static struct bpf_map *ringbuf_map_alloc(union bpf_attr *attr)
 		return ERR_PTR(-E2BIG);
 #endif
 
-	rb_map = kzalloc(sizeof(*rb_map), GFP_USER);
+	rb_map = kzalloc(sizeof(*rb_map), GFP_USER | __GFP_ACCOUNT);
 	if (!rb_map)
 		return ERR_PTR(-ENOMEM);
 
-- 
2.26.2