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From:   Roman Gushchin <guro@fb.com>
To:     <bpf@vger.kernel.org>
CC:     <ast@kernel.org>, <daniel@iogearbox.net>, <netdev@vger.kernel.org>,
        <andrii@kernel.org>, <akpm@linux-foundation.org>,
        <linux-mm@kvack.org>, <linux-kernel@vger.kernel.org>,
        <kernel-team@fb.com>
Subject: [PATCH bpf-next v9 24/34] bpf: eliminate rlimit-based memory accounting for lpm_trie maps
Date:   Tue, 1 Dec 2020 13:58:50 -0800
Message-ID: <20201201215900.3569844-25-guro@fb.com>
In-Reply-To: <20201201215900.3569844-1-guro@fb.com>
References: <20201201215900.3569844-1-guro@fb.com>
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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>
Acked-by: Song Liu <songliubraving@fb.com>
---
 kernel/bpf/lpm_trie.c | 13 -------------
 1 file changed, 13 deletions(-)

diff --git a/kernel/bpf/lpm_trie.c b/kernel/bpf/lpm_trie.c
index 1a6981203d7f..cec792a17e5f 100644
--- a/kernel/bpf/lpm_trie.c
+++ b/kernel/bpf/lpm_trie.c
@@ -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 =3D sizeof(*trie), cost_per_node;
-	int ret;
=20
 	if (!bpf_capable())
 		return ERR_PTR(-EPERM);
@@ -567,20 +565,9 @@ static struct bpf_map *trie_alloc(union bpf_attr *at=
tr)
 			  offsetof(struct bpf_lpm_trie_key, data);
 	trie->max_prefixlen =3D trie->data_size * 8;
=20
-	cost_per_node =3D sizeof(struct lpm_trie_node) +
-			attr->value_size + trie->data_size;
-	cost +=3D (u64) attr->max_entries * cost_per_node;
-
-	ret =3D bpf_map_charge_init(&trie->map.memory, cost);
-	if (ret)
-		goto out_err;
-
 	spin_lock_init(&trie->lock);
=20
 	return &trie->map;
-out_err:
-	kfree(trie);
-	return ERR_PTR(ret);
 }
=20
 static void trie_free(struct bpf_map *map)
--=20
2.26.2