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Fri, 21 Aug 2020 08:23:47 -0700 Received: from intmgw002.06.prn3.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:83::4) 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 08:23:47 -0700 Received: by devvm1096.prn0.facebook.com (Postfix, from userid 111017) id A586C3441079; 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 25/30] bpf: eliminate rlimit-based memory accounting for stackmap maps Date: Fri, 21 Aug 2020 08:01:29 -0700 Message-ID: <20200821150134.2581465-26-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 phishscore=0 spamscore=0 lowpriorityscore=0 clxscore=1015 bulkscore=0 priorityscore=1501 mlxlogscore=770 suspectscore=38 mlxscore=0 adultscore=0 malwarescore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2008210143 X-FB-Internal: deliver X-Rspamd-Queue-Id: 26DB81804A301 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam05 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 stackmap maps. It has been replaced with the memcg-based memory accounting. Signed-off-by: Roman Gushchin Acked-by: Song Liu --- kernel/bpf/stackmap.c | 16 +++------------- 1 file changed, 3 insertions(+), 13 deletions(-) diff --git a/kernel/bpf/stackmap.c b/kernel/bpf/stackmap.c index cfed0ac44d38..40e9814906c5 100644 --- a/kernel/bpf/stackmap.c +++ b/kernel/bpf/stackmap.c @@ -90,7 +90,6 @@ static struct bpf_map *stack_map_alloc(union bpf_attr *= attr) { u32 value_size =3D attr->value_size; struct bpf_stack_map *smap; - struct bpf_map_memory mem; u64 cost, n_buckets; int err; =20 @@ -119,15 +118,9 @@ static struct bpf_map *stack_map_alloc(union bpf_att= r *attr) =20 cost =3D n_buckets * sizeof(struct stack_map_bucket *) + sizeof(*smap); cost +=3D n_buckets * (value_size + sizeof(struct stack_map_bucket)); - err =3D bpf_map_charge_init(&mem, cost); - if (err) - return ERR_PTR(err); - smap =3D bpf_map_area_alloc(cost, bpf_map_attr_numa_node(attr)); - if (!smap) { - bpf_map_charge_finish(&mem); + if (!smap) return ERR_PTR(-ENOMEM); - } =20 bpf_map_init_from_attr(&smap->map, attr); smap->map.value_size =3D value_size; @@ -135,20 +128,17 @@ static struct bpf_map *stack_map_alloc(union bpf_at= tr *attr) =20 err =3D get_callchain_buffers(sysctl_perf_event_max_stack); if (err) - goto free_charge; + goto free_smap; =20 err =3D prealloc_elems_and_freelist(smap); if (err) goto put_buffers; =20 - bpf_map_charge_move(&smap->map.memory, &mem); - return &smap->map; =20 put_buffers: put_callchain_buffers(); -free_charge: - bpf_map_charge_finish(&mem); +free_smap: bpf_map_area_free(smap); return ERR_PTR(err); } --=20 2.26.2