From: Roman Gushchin <guro@fb.com>
To: <bpf@vger.kernel.org>
Cc: <netdev@vger.kernel.org>, Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>, <kernel-team@fb.com>,
<linux-kernel@vger.kernel.org>, Roman Gushchin <guro@fb.com>
Subject: [PATCH bpf-next v2 22/35] bpf: eliminate rlimit-based memory accounting for bpf ringbuffer
Date: Mon, 27 Jul 2020 11:44:53 -0700 [thread overview]
Message-ID: <20200727184506.2279656-23-guro@fb.com> (raw)
In-Reply-To: <20200727184506.2279656-1-guro@fb.com>
Do not use rlimit-based memory accounting for bpf ringbuffer.
It has been replaced with the memcg-based memory accounting.
bpf_ringbuf_alloc() can't return anything except ERR_PTR(-ENOMEM)
and a valid pointer, so to simplify the code make it return NULL
in the first case. This allows to drop a couple of lines in
ringbuf_map_alloc() and also makes it look similar to other memory
allocating function like kmalloc().
Signed-off-by: Roman Gushchin <guro@fb.com>
---
kernel/bpf/ringbuf.c | 24 ++++--------------------
1 file changed, 4 insertions(+), 20 deletions(-)
diff --git a/kernel/bpf/ringbuf.c b/kernel/bpf/ringbuf.c
index e8e2c39cbdc9..e687b798d097 100644
--- a/kernel/bpf/ringbuf.c
+++ b/kernel/bpf/ringbuf.c
@@ -48,7 +48,6 @@ struct bpf_ringbuf {
struct bpf_ringbuf_map {
struct bpf_map map;
- struct bpf_map_memory memory;
struct bpf_ringbuf *rb;
};
@@ -135,7 +134,7 @@ static struct bpf_ringbuf *bpf_ringbuf_alloc(size_t data_sz, int numa_node)
rb = bpf_ringbuf_area_alloc(data_sz, numa_node);
if (!rb)
- return ERR_PTR(-ENOMEM);
+ return NULL;
spin_lock_init(&rb->spinlock);
init_waitqueue_head(&rb->waitq);
@@ -151,8 +150,6 @@ static struct bpf_ringbuf *bpf_ringbuf_alloc(size_t data_sz, int numa_node)
static struct bpf_map *ringbuf_map_alloc(union bpf_attr *attr)
{
struct bpf_ringbuf_map *rb_map;
- u64 cost;
- int err;
if (attr->map_flags & ~RINGBUF_CREATE_FLAG_MASK)
return ERR_PTR(-EINVAL);
@@ -174,26 +171,13 @@ static struct bpf_map *ringbuf_map_alloc(union bpf_attr *attr)
bpf_map_init_from_attr(&rb_map->map, attr);
- cost = sizeof(struct bpf_ringbuf_map) +
- sizeof(struct bpf_ringbuf) +
- attr->max_entries;
- err = bpf_map_charge_init(&rb_map->map.memory, cost);
- if (err)
- goto err_free_map;
-
rb_map->rb = bpf_ringbuf_alloc(attr->max_entries, rb_map->map.numa_node);
- if (IS_ERR(rb_map->rb)) {
- err = PTR_ERR(rb_map->rb);
- goto err_uncharge;
+ if (!rb_map->rb) {
+ kfree(rb_map);
+ return ERR_PTR(-ENOMEM);
}
return &rb_map->map;
-
-err_uncharge:
- bpf_map_charge_finish(&rb_map->map.memory);
-err_free_map:
- kfree(rb_map);
- return ERR_PTR(err);
}
static void bpf_ringbuf_free(struct bpf_ringbuf *rb)
--
2.26.2
next prev parent reply other threads:[~2020-07-27 18:46 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-27 18:44 [PATCH bpf-next v2 00/35] bpf: switch to memcg-based memory accounting Roman Gushchin
2020-07-27 18:44 ` [PATCH bpf-next v2 01/35] bpf: memcg-based memory accounting for bpf progs Roman Gushchin
2020-07-27 22:11 ` Song Liu
2020-07-28 0:08 ` Roman Gushchin
2020-07-28 4:42 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 02/35] bpf: memcg-based memory accounting for bpf maps Roman Gushchin
2020-07-27 22:12 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 03/35] bpf: refine memcg-based memory accounting for arraymap maps Roman Gushchin
2020-07-27 22:30 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 04/35] bpf: refine memcg-based memory accounting for cpumap maps Roman Gushchin
2020-07-27 22:48 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 05/35] bpf: memcg-based memory accounting for cgroup storage maps Roman Gushchin
2020-07-27 23:05 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 06/35] bpf: refine memcg-based memory accounting for devmap maps Roman Gushchin
2020-07-27 23:35 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 07/35] bpf: refine memcg-based memory accounting for hashtab maps Roman Gushchin
2020-07-27 23:36 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 08/35] bpf: memcg-based memory accounting for lpm_trie maps Roman Gushchin
2020-07-27 23:55 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 09/35] bpf: memcg-based memory accounting for bpf ringbuffer Roman Gushchin
2020-07-27 23:56 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 10/35] bpf: memcg-based memory accounting for socket storage maps Roman Gushchin
2020-07-27 23:57 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 11/35] bpf: refine memcg-based memory accounting for sockmap and sockhash maps Roman Gushchin
2020-07-27 23:58 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 12/35] bpf: refine memcg-based memory accounting for xskmap maps Roman Gushchin
2020-07-28 0:01 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 13/35] bpf: eliminate rlimit-based memory accounting for arraymap maps Roman Gushchin
2020-07-28 0:04 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 14/35] bpf: eliminate rlimit-based memory accounting for bpf_struct_ops maps Roman Gushchin
2020-07-28 5:29 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 15/35] bpf: eliminate rlimit-based memory accounting for cpumap maps Roman Gushchin
2020-07-28 5:30 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 16/35] bpf: eliminate rlimit-based memory accounting for cgroup storage maps Roman Gushchin
2020-07-28 5:31 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 17/35] bpf: eliminate rlimit-based memory accounting for devmap maps Roman Gushchin
2020-07-28 5:31 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 18/35] bpf: eliminate rlimit-based memory accounting for hashtab maps Roman Gushchin
2020-07-28 5:32 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 19/35] bpf: eliminate rlimit-based memory accounting for lpm_trie maps Roman Gushchin
2020-07-28 5:32 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 20/35] bpf: eliminate rlimit-based memory accounting for queue_stack_maps maps Roman Gushchin
2020-07-28 5:35 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 21/35] bpf: eliminate rlimit-based memory accounting for reuseport_array maps Roman Gushchin
2020-07-28 5:36 ` Song Liu
2020-07-27 18:44 ` Roman Gushchin [this message]
2020-07-28 5:37 ` [PATCH bpf-next v2 22/35] bpf: eliminate rlimit-based memory accounting for bpf ringbuffer Song Liu
2020-07-28 5:56 ` Andrii Nakryiko
2020-07-27 18:44 ` [PATCH bpf-next v2 23/35] bpf: eliminate rlimit-based memory accounting for sockmap and sockhash maps Roman Gushchin
2020-07-28 5:37 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 24/35] bpf: eliminate rlimit-based memory accounting for stackmap maps Roman Gushchin
2020-07-28 5:38 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 25/35] bpf: eliminate rlimit-based memory accounting for socket storage maps Roman Gushchin
2020-07-28 5:41 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 26/35] bpf: eliminate rlimit-based memory accounting for xskmap maps Roman Gushchin
2020-07-28 5:42 ` Song Liu
2020-07-27 18:44 ` [PATCH bpf-next v2 27/35] bpf: eliminate rlimit-based memory accounting infra for bpf maps Roman Gushchin
2020-07-28 5:47 ` Song Liu
2020-07-28 5:58 ` Andrii Nakryiko
2020-07-28 6:06 ` Song Liu
2020-07-28 19:08 ` Roman Gushchin
2020-07-28 19:16 ` Andrii Nakryiko
2020-07-27 18:44 ` [PATCH bpf-next v2 28/35] bpf: eliminate rlimit-based memory accounting for bpf progs Roman Gushchin
2020-07-28 5:55 ` Song Liu
2020-07-27 18:45 ` [PATCH bpf-next v2 29/35] bpf: libbpf: cleanup RLIMIT_MEMLOCK usage Roman Gushchin
2020-07-27 22:05 ` Andrii Nakryiko
2020-07-27 22:44 ` Song Liu
2020-07-27 23:15 ` Roman Gushchin
2020-07-28 5:59 ` Andrii Nakryiko
2020-07-30 1:38 ` Roman Gushchin
2020-07-30 19:39 ` Andrii Nakryiko
2020-07-30 20:46 ` Roman Gushchin
2020-07-27 18:45 ` [PATCH bpf-next v2 30/35] bpf: bpftool: do not touch RLIMIT_MEMLOCK Roman Gushchin
2020-07-28 6:00 ` Song Liu
2020-07-28 6:00 ` Andrii Nakryiko
2020-07-27 18:45 ` [PATCH bpf-next v2 31/35] bpf: runqslower: don't " Roman Gushchin
2020-07-28 6:03 ` Andrii Nakryiko
2020-07-27 18:45 ` [PATCH bpf-next v2 32/35] bpf: selftests: delete bpf_rlimit.h Roman Gushchin
2020-07-28 6:06 ` Andrii Nakryiko
2020-07-28 6:11 ` Song Liu
2020-07-28 18:30 ` Andrii Nakryiko
2020-07-27 18:45 ` [PATCH bpf-next v2 33/35] bpf: selftests: don't touch RLIMIT_MEMLOCK Roman Gushchin
2020-07-28 6:08 ` Andrii Nakryiko
2020-07-27 18:45 ` [PATCH bpf-next v2 34/35] bpf: samples: do not " Roman Gushchin
2020-07-28 6:14 ` Song Liu
2020-07-27 18:45 ` [PATCH bpf-next v2 35/35] perf: don't " Roman Gushchin
2020-07-28 6:09 ` Andrii Nakryiko
2020-07-28 12:13 ` Arnaldo Carvalho de Melo
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