From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from 66-220-144-178.mail-mxout.facebook.com (66-220-144-178.mail-mxout.facebook.com [66.220.144.178]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 08D2528BA99 for ; Fri, 6 Jun 2025 17:42:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=66.220.144.178 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749231724; cv=none; b=l8Fhpz1v5AsGXenZeKvfbZMpCAjB4lCpcTZfGaTeztSuKUMDT1P84CZSdB9X2UAYd+ctilNZ9xGanRST36Lgv1aiTDfqE7lsa5msNCQbtrk18g5WXMDxOfrx7yM6k4mjAlfIs35ilo0xlCqpejMXJIc+iQu//7y2RGr3v/GvGxY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749231724; c=relaxed/simple; bh=NmJ+Msv6fUmqKhjBC4MSS0SFpd8+eyyd3BJsab8idZk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=HQpy0Gw7e7xAwGZYB9vZynGg3oVTLWx28k7d6V0kMUDJS3dyl5CrnUQ14kBm/HZB3d5Li21GWSVgJLm45zlOSRv0mroH43QJtBt9HXJ7y0mB0We8ertH/7najKaIjJufJgDqaPYxE5731PiD7dHU4K4AShPuKIjDDkoFiRtPySc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.dev; spf=fail smtp.mailfrom=linux.dev; arc=none smtp.client-ip=66.220.144.178 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=linux.dev Received: by devvm16039.vll0.facebook.com (Postfix, from userid 128203) id 4B1E49046D2B; Fri, 6 Jun 2025 10:41:55 -0700 (PDT) From: Yonghong Song To: bpf@vger.kernel.org Cc: Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , kernel-team@fb.com, Martin KaFai Lau Subject: [PATCH bpf-next v2 3/4] selftests/bpf: Fix ringbuf/ringbuf_write test failure with arm64 64KB page size Date: Fri, 6 Jun 2025 10:41:55 -0700 Message-ID: <20250606174155.3037298-1-yonghong.song@linux.dev> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250606174139.3036576-1-yonghong.song@linux.dev> References: <20250606174139.3036576-1-yonghong.song@linux.dev> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable The ringbuf max_entries must be PAGE_ALIGNED. See kernel function ringbuf_map_alloc(). So for arm64 64KB page size, adjust max_entries properly. Signed-off-by: Yonghong Song --- tools/testing/selftests/bpf/prog_tests/ringbuf.c | 5 +++-- tools/testing/selftests/bpf/progs/test_ringbuf_write.c | 5 +++-- 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/ringbuf.c b/tools/tes= ting/selftests/bpf/prog_tests/ringbuf.c index da430df45aa4..89fd3401a23e 100644 --- a/tools/testing/selftests/bpf/prog_tests/ringbuf.c +++ b/tools/testing/selftests/bpf/prog_tests/ringbuf.c @@ -97,7 +97,8 @@ static void ringbuf_write_subtest(void) if (!ASSERT_OK_PTR(skel, "skel_open")) return; =20 - skel->maps.ringbuf.max_entries =3D 0x4000; + skel->maps.ringbuf.max_entries =3D 4 * page_size; + skel->rodata->reserve_size =3D 3 * page_size; =20 err =3D test_ringbuf_write_lskel__load(skel); if (!ASSERT_OK(err, "skel_load")) @@ -108,7 +109,7 @@ static void ringbuf_write_subtest(void) mmap_ptr =3D mmap(NULL, page_size, PROT_READ | PROT_WRITE, MAP_SHARED, = rb_fd, 0); if (!ASSERT_OK_PTR(mmap_ptr, "rw_cons_pos")) goto cleanup; - *mmap_ptr =3D 0x3000; + *mmap_ptr =3D 3 * page_size; ASSERT_OK(munmap(mmap_ptr, page_size), "unmap_rw"); =20 skel->bss->pid =3D getpid(); diff --git a/tools/testing/selftests/bpf/progs/test_ringbuf_write.c b/too= ls/testing/selftests/bpf/progs/test_ringbuf_write.c index 350513c0e4c9..9acef7afbe8a 100644 --- a/tools/testing/selftests/bpf/progs/test_ringbuf_write.c +++ b/tools/testing/selftests/bpf/progs/test_ringbuf_write.c @@ -12,6 +12,7 @@ struct { =20 /* inputs */ int pid =3D 0; +const volatile int reserve_size =3D 0; =20 /* outputs */ long passed =3D 0; @@ -26,11 +27,11 @@ int test_ringbuf_write(void *ctx) if (cur_pid !=3D pid) return 0; =20 - sample1 =3D bpf_ringbuf_reserve(&ringbuf, 0x3000, 0); + sample1 =3D bpf_ringbuf_reserve(&ringbuf, reserve_size, 0); if (!sample1) return 0; /* first one can pass */ - sample2 =3D bpf_ringbuf_reserve(&ringbuf, 0x3000, 0); + sample2 =3D bpf_ringbuf_reserve(&ringbuf, reserve_size, 0); if (!sample2) { bpf_ringbuf_discard(sample1, 0); __sync_fetch_and_add(&discarded, 1); --=20 2.47.1