From patchwork Wed Dec 15 06:00:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Song Liu X-Patchwork-Id: 12677389 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7E033C433EF for ; Wed, 15 Dec 2021 06:01:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239963AbhLOGBZ convert rfc822-to-8bit (ORCPT ); Wed, 15 Dec 2021 01:01:25 -0500 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:58144 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235741AbhLOGBY (ORCPT ); Wed, 15 Dec 2021 01:01:24 -0500 Received: from pps.filterd (m0044012.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.1.2/8.16.1.2) with ESMTP id 1BF343JX012248 for ; Tue, 14 Dec 2021 22:01:23 -0800 Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3cy84krxhk-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Tue, 14 Dec 2021 22:01:23 -0800 Received: from intmgw006.03.ash8.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:82::d) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.20; Tue, 14 Dec 2021 22:01:21 -0800 Received: by devbig006.ftw2.facebook.com (Postfix, from userid 4523) id 984A926045B20; Tue, 14 Dec 2021 22:01:19 -0800 (PST) From: Song Liu To: , , CC: , , , , , , Song Liu Subject: [PATCH v2 bpf-next 0/7] bpf_prog_pack allocator Date: Tue, 14 Dec 2021 22:00:55 -0800 Message-ID: <20211215060102.3793196-1-song@kernel.org> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-FB-Internal: Safe X-FB-Source: Intern X-Proofpoint-GUID: 9DoxIo_fq6vERrh8xTQFU6FAfnOMY9Gs X-Proofpoint-ORIG-GUID: 9DoxIo_fq6vERrh8xTQFU6FAfnOMY9Gs X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2021-12-15_06,2021-12-14_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=fb_outbound_notspam policy=fb_outbound score=0 suspectscore=0 spamscore=0 clxscore=1034 bulkscore=0 mlxlogscore=622 priorityscore=1501 impostorscore=0 lowpriorityscore=0 mlxscore=0 phishscore=0 malwarescore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2112150035 X-FB-Internal: deliver Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net Changes v1 => v2: 1. Use text_poke instead of writing through linear mapping. (Peter) 2. Avoid making changes to non-x86_64 code. Most BPF programs are small, but they consume a page each. For systems with busy traffic and many BPF programs, this could also add significant pressure to instruction TLB. This set tries to solve this problem with customized allocator that pack multiple programs into a huge page. Patches 1-5 prepare the work. Patch 6 contains key logic of the allocator. Patch 7 uses this allocator in x86_64 jit compiler. Song Liu (7): x86/Kconfig: select HAVE_ARCH_HUGE_VMALLOC with HAVE_ARCH_HUGE_VMAP bpf: use bytes instead of pages for bpf_jit_[charge|uncharge]_modmem bpf: use size instead of pages in bpf_binary_header bpf: add a pointer of bpf_binary_header to bpf_prog x86/alternative: introduce text_poke_jit bpf: introduce bpf_prog_pack allocator bpf, x86_64: use bpf_prog_pack allocator arch/x86/Kconfig | 1 + arch/x86/include/asm/text-patching.h | 1 + arch/x86/kernel/alternative.c | 28 ++++ arch/x86/net/bpf_jit_comp.c | 93 ++++++++++-- include/linux/bpf.h | 4 +- include/linux/filter.h | 23 ++- kernel/bpf/core.c | 213 ++++++++++++++++++++++++--- kernel/bpf/trampoline.c | 6 +- 8 files changed, 328 insertions(+), 41 deletions(-) --- 2.30.2