From: Song Liu <song@kernel.org>
To: Roman Gushchin <guro@fb.com>
Cc: bpf <bpf@vger.kernel.org>, Networking <netdev@vger.kernel.org>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Kernel Team <kernel-team@fb.com>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH bpf-next v2 22/35] bpf: eliminate rlimit-based memory accounting for bpf ringbuffer
Date: Mon, 27 Jul 2020 22:37:07 -0700 [thread overview]
Message-ID: <CAPhsuW7nHNaf9Cgjwr_3zLVae4yBiLsvd7+tVkpS6EaiGRZ4tA@mail.gmail.com> (raw)
In-Reply-To: <20200727184506.2279656-23-guro@fb.com>
On Mon, Jul 27, 2020 at 12:22 PM Roman Gushchin <guro@fb.com> wrote:
>
> 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>
Acked-by: Song Liu <songliubraving@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:[~2020-07-28 5:37 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 ` [PATCH bpf-next v2 22/35] bpf: eliminate rlimit-based memory accounting for bpf ringbuffer Roman Gushchin
2020-07-28 5:37 ` Song Liu [this message]
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CAPhsuW7nHNaf9Cgjwr_3zLVae4yBiLsvd7+tVkpS6EaiGRZ4tA@mail.gmail.com \
--to=song@kernel.org \
--cc=ast@kernel.org \
--cc=bpf@vger.kernel.org \
--cc=daniel@iogearbox.net \
--cc=guro@fb.com \
--cc=kernel-team@fb.com \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).