unimore/kernel-hacking-2024-linux-steffo
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bpf: Eliminate rlimit-based memory accounting for lpm_trie maps

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Do not use rlimit-based memory accounting for lpm_trie maps.
It has been replaced with the memcg-based memory accounting.

Signed-off-by: Roman Gushchin <guro@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20201201215900.3569844-25-guro@fb.com
This commit is contained in:
Roman Gushchin 2020-12-01 13:58:50 -08:00 committed by Alexei Starovoitov
parent 755e5d5536
commit cbddcb574d
1 changed files with 0 additions and 13 deletions
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13
kernel/bpf/lpm_trie.c
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@ -540,8 +540,6 @@ static int trie_delete_elem(struct bpf_map *map, void *_key)
static struct bpf_map *trie_alloc(union bpf_attr *attr)
{
struct lpm_trie *trie;
u64 cost = sizeof(*trie), cost_per_node;
int ret;
if (!bpf_capable())
return ERR_PTR(-EPERM);
@ -567,20 +565,9 @@ static struct bpf_map *trie_alloc(union bpf_attr *attr)
offsetof(struct bpf_lpm_trie_key, data);
trie->max_prefixlen = trie->data_size * 8;
cost_per_node = sizeof(struct lpm_trie_node) +
attr->value_size + trie->data_size;
cost += (u64) attr->max_entries * cost_per_node;
ret = bpf_map_charge_init(&trie->map.memory, cost);
if (ret)
goto out_err;
spin_lock_init(&trie->lock);
return &trie->map;
out_err:
kfree(trie);
return ERR_PTR(ret);
}
static void trie_free(struct bpf_map *map)