Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Smtp-Origin-Hostprefix: devvm
From:   Roman Gushchin <guro@fb.com>
Smtp-Origin-Hostname: devvm1096.prn0.facebook.com
To:     <bpf@vger.kernel.org>
CC:     <netdev@vger.kernel.org>, Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>, <kernel-team@fb.com>,
        <linux-kernel@vger.kernel.org>, Roman Gushchin <guro@fb.com>
Smtp-Origin-Cluster: prn0c01
Subject: [PATCH bpf-next v2 31/35] bpf: runqslower: don't touch RLIMIT_MEMLOCK
Date:   Mon, 27 Jul 2020 11:45:02 -0700
Message-ID: <20200727184506.2279656-32-guro@fb.com>
In-Reply-To: <20200727184506.2279656-1-guro@fb.com>
References: <20200727184506.2279656-1-guro@fb.com>
MIME-Version: 1.0
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Since bpf is not using memlock rlimit for memory accounting,
there are no more reasons to bump the limit.

Signed-off-by: Roman Gushchin <guro@fb.com>
---
 tools/bpf/runqslower/runqslower.c | 16 ----------------
 1 file changed, 16 deletions(-)

diff --git a/tools/bpf/runqslower/runqslower.c b/tools/bpf/runqslower/run=
qslower.c
index d89715844952..a3380b53ce0c 100644
--- a/tools/bpf/runqslower/runqslower.c
+++ b/tools/bpf/runqslower/runqslower.c
@@ -88,16 +88,6 @@ int libbpf_print_fn(enum libbpf_print_level level,
 	return vfprintf(stderr, format, args);
 }
=20
-static int bump_memlock_rlimit(void)
-{
-	struct rlimit rlim_new =3D {
-		.rlim_cur	=3D RLIM_INFINITY,
-		.rlim_max	=3D RLIM_INFINITY,
-	};
-
-	return setrlimit(RLIMIT_MEMLOCK, &rlim_new);
-}
-
 void handle_event(void *ctx, int cpu, void *data, __u32 data_sz)
 {
 	const struct event *e =3D data;
@@ -134,12 +124,6 @@ int main(int argc, char **argv)
=20
 	libbpf_set_print(libbpf_print_fn);
=20
-	err =3D bump_memlock_rlimit();
-	if (err) {
-		fprintf(stderr, "failed to increase rlimit: %d", err);
-		return 1;
-	}
-
 	obj =3D runqslower_bpf__open();
 	if (!obj) {
 		fprintf(stderr, "failed to open and/or load BPF object\n");
--=20
2.26.2