linux-kernel - Re: [PATCH bpf-next v2 10/35] bpf: memcg-based memory accounting for socket storage maps

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Date:   Mon, 27 Jul 2020 16:57:39 -0700
From:   Song Liu <song@...nel.org>
To:     Roman Gushchin <guro@...com>
Cc:     bpf <bpf@...r.kernel.org>, Networking <netdev@...r.kernel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Kernel Team <kernel-team@...com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH bpf-next v2 10/35] bpf: memcg-based memory accounting for
 socket storage maps

On Mon, Jul 27, 2020 at 12:28 PM Roman Gushchin <guro@...com> wrote:
>
> Account memory used by the socket storage.
>
> Signed-off-by: Roman Gushchin <guro@...com>

Acked-by: Song Liu <songliubraving@...com>

> ---
>  net/core/bpf_sk_storage.c | 12 +++++++-----
>  1 file changed, 7 insertions(+), 5 deletions(-)
>
> diff --git a/net/core/bpf_sk_storage.c b/net/core/bpf_sk_storage.c
> index eafcd15e7dfd..fbcd03cd00d3 100644
> --- a/net/core/bpf_sk_storage.c
> +++ b/net/core/bpf_sk_storage.c
> @@ -130,7 +130,8 @@ static struct bpf_sk_storage_elem *selem_alloc(struct bpf_sk_storage_map *smap,
>         if (charge_omem && omem_charge(sk, smap->elem_size))
>                 return NULL;
>
> -       selem = kzalloc(smap->elem_size, GFP_ATOMIC | __GFP_NOWARN);
> +       selem = kzalloc(smap->elem_size,
> +                       GFP_ATOMIC | __GFP_NOWARN | __GFP_ACCOUNT);
>         if (selem) {
>                 if (value)
>                         memcpy(SDATA(selem)->data, value, smap->map.value_size);
> @@ -337,7 +338,8 @@ static int sk_storage_alloc(struct sock *sk,
>         if (err)
>                 return err;
>
> -       sk_storage = kzalloc(sizeof(*sk_storage), GFP_ATOMIC | __GFP_NOWARN);
> +       sk_storage = kzalloc(sizeof(*sk_storage),
> +                            GFP_ATOMIC | __GFP_NOWARN | __GFP_ACCOUNT);
>         if (!sk_storage) {
>                 err = -ENOMEM;
>                 goto uncharge;
> @@ -677,7 +679,7 @@ static struct bpf_map *bpf_sk_storage_map_alloc(union bpf_attr *attr)
>         u64 cost;
>         int ret;
>
> -       smap = kzalloc(sizeof(*smap), GFP_USER | __GFP_NOWARN);
> +       smap = kzalloc(sizeof(*smap), GFP_USER | __GFP_NOWARN | __GFP_ACCOUNT);
>         if (!smap)
>                 return ERR_PTR(-ENOMEM);
>         bpf_map_init_from_attr(&smap->map, attr);
> @@ -695,7 +697,7 @@ static struct bpf_map *bpf_sk_storage_map_alloc(union bpf_attr *attr)
>         }
>
>         smap->buckets = kvcalloc(sizeof(*smap->buckets), nbuckets,
> -                                GFP_USER | __GFP_NOWARN);
> +                                GFP_USER | __GFP_NOWARN | __GFP_ACCOUNT);
>         if (!smap->buckets) {
>                 bpf_map_charge_finish(&smap->map.memory);
>                 kfree(smap);
> @@ -1024,7 +1026,7 @@ bpf_sk_storage_diag_alloc(const struct nlattr *nla_stgs)
>         }
>
>         diag = kzalloc(sizeof(*diag) + sizeof(diag->maps[0]) * nr_maps,
> -                      GFP_KERNEL);
> +                      GFP_KERNEL | __GFP_ACCOUNT);
>         if (!diag)
>                 return ERR_PTR(-ENOMEM);
>
> --
> 2.26.2
>