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Fri, 21 Aug 2020 08:28:44 -0700 Received: from intmgw003.06.prn3.facebook.com (2620:10d:c085:208::11) by mail.thefacebook.com (2620:10d:c085:21d::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Fri, 21 Aug 2020 08:28:43 -0700 Received: by devvm1096.prn0.facebook.com (Postfix, from userid 111017) id 8DC22344106F; Fri, 21 Aug 2020 08:01:35 -0700 (PDT) Smtp-Origin-Hostprefix: devvm From: Roman Gushchin Smtp-Origin-Hostname: devvm1096.prn0.facebook.com To: CC: , Alexei Starovoitov , Daniel Borkmann , , , Johannes Weiner , Shakeel Butt , , Roman Gushchin , Song Liu Smtp-Origin-Cluster: prn0c01 Subject: [PATCH bpf-next v4 20/30] bpf: eliminate rlimit-based memory accounting for lpm_trie maps Date: Fri, 21 Aug 2020 08:01:24 -0700 Message-ID: <20200821150134.2581465-21-guro@fb.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200821150134.2581465-1-guro@fb.com> References: <20200821150134.2581465-1-guro@fb.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-08-21_08:2020-08-21,2020-08-21 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 lowpriorityscore=0 priorityscore=1501 spamscore=0 mlxscore=0 suspectscore=38 mlxlogscore=736 phishscore=0 malwarescore=0 impostorscore=0 clxscore=1015 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2008210144 X-FB-Internal: deliver X-Rspamd-Queue-Id: DD200180F8B9C X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam01 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 Acked-by: Song Liu --- 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 d85e0fc2cafc..c747f0835eb1 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