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[2620:137:e000::1:20]) by mx.google.com with ESMTP id ix10-20020a170902f80a00b00176a2d5ae14si4852019plb.363.2022.11.05.22.46.41; Sat, 05 Nov 2022 22:46:53 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@bytedance-com.20210112.gappssmtp.com header.s=20210112 header.b=CZfQz2Cm; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=bytedance.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229556AbiKFFfc (ORCPT + 97 others); Sun, 6 Nov 2022 01:35:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57528 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229562AbiKFFf2 (ORCPT ); Sun, 6 Nov 2022 01:35:28 -0400 Received: from mail-pj1-x1032.google.com (mail-pj1-x1032.google.com [IPv6:2607:f8b0:4864:20::1032]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5A9E262E1 for ; Sat, 5 Nov 2022 22:35:26 -0700 (PDT) Received: by mail-pj1-x1032.google.com with SMTP id k5so7829405pjo.5 for ; Sat, 05 Nov 2022 22:35:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=YoUZh4lJUYrbwudjwdWbM7Cwr0IVA3bWnluUyVYLrBY=; b=CZfQz2CmGeqn+3G+XO9nhVZykM8puBDwRCTbEbwO1T3oJG9CUz3EAgZnivZdIagWOu wfL0OnvXE+CldbKw9tP6lAObZ6x5GBMoUxKKYskLIYkyuKVkxe/NUKM54hb/txgcA4K8 dqHfQ/x6fxAexo9dSHBQP0vHEfv0Rw7+enOfnvKCMLvAN5lUfU4/A9f/fIoOLdw105rv D6OTLMSEZZHAWWKP+TSmZL8rAAAFjCPqShme8N/F9dxYvAc2oeRzf3sxp4++UPVNNmS+ BvrKo3HEakiSFe5a9hmES5hknaUufT8Zp4AEutFYL5xUZeGJrM8Az3cTJqnmOXxz616m Bh8A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=YoUZh4lJUYrbwudjwdWbM7Cwr0IVA3bWnluUyVYLrBY=; b=QBL0ltkcqDZIHMi+MrigHwfARUJ2GoSlZEER9EBq3ivSd79cq+qAdDJgKnpCT6N2ui C7Uq+vXZrqfUNq4mJhbQtIuXnxbDCPzVR6Di5xh/ldBcBEQRFSSEbfRCqEeVBQyPyUXc /mywmQlNgrIRxaDaHgN53WxhvrKsMr8afQ1vfpRckXOavX5/JlNdnpdrCbTjhSV0QkjT p6nfmD8KilzZ3VO5RuN3YGYY6Mw89vy+e4uwx76pz8/8m1DvknZrQ5SrzlCaKmB0tybE 0XHZ6ZOyDNJwpCJ/X/aVBCv8O5ELEer2rHhCiQqyjOSY2FoCnSWNryMt4gFXfHfQYGcS 7gtg== X-Gm-Message-State: ANoB5plQZ521o0Y81w9SmuUouqdEFOJrsmEJCeTshw+DGKsfMLX/81wu imn7HER0iPBDnRPBtNl8aXsSNw== X-Received: by 2002:a17:902:7044:b0:188:6d97:7aaa with SMTP id h4-20020a170902704400b001886d977aaamr8408005plt.11.1667712925904; Sat, 05 Nov 2022 22:35:25 -0700 (PDT) Received: from devtp.bytedance.net ([139.177.225.243]) by smtp.gmail.com with ESMTPSA id q27-20020aa7961b000000b0056bee236e9csm2127121pfg.142.2022.11.05.22.35.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 05 Nov 2022 22:35:25 -0700 (PDT) From: wuqiang To: mhiramat@kernel.org, davem@davemloft.net, anil.s.keshavamurthy@intel.com, naveen.n.rao@linux.ibm.com, rostedt@goodmis.org, peterz@infradead.org, akpm@linux-foundation.org, sander@svanheule.net, ebiggers@google.com, dan.j.williams@intel.com, jpoimboe@kernel.org Cc: linux-kernel@vger.kernel.org, lkp@intel.com, mattwu@163.com Subject: [PATCH v5 0/4] lib,kprobes: kretprobe scalability improvement Date: Sun, 6 Nov 2022 13:34:37 +0800 Message-Id: <20221106053441.103199-1-wuqiang.matt@bytedance.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221102023012.6362-1-wuqiang.matt@bytedance.com> References: <20221102023012.6362-1-wuqiang.matt@bytedance.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch series introduces a scalable and lockless ring-array based object pool and replaces the original freelist (a LIFO queue based on singly linked list) to improve the scalability of kretprobed routines. Changes from v4: 1) compiling failure with [-Werror=designated-init] 2) compiling failure for sparc: prefetch() not defined 3) comments & codes of objpool routines refined v4 and more: https://lore.kernel.org/all/20221102023012.6362-1-wuqiang.matt@bytedance.com --- include/linux/freelist.h | 129 ------------ include/linux/kprobes.h | 9 +- include/linux/objpool.h | 153 ++++++++++++++ include/linux/rethook.h | 15 +- kernel/kprobes.c | 95 ++++----- kernel/trace/fprobe.c | 17 +- kernel/trace/rethook.c | 80 +++---- lib/Kconfig.debug | 11 + lib/Makefile | 4 +- lib/objpool.c | 487 +++++++++++++++++++++++++++++++++++++++++++ lib/test_objpool.c | 1052 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 11 files changed, 1802 insertions(+), 250 deletions(-) create mode 100644 include/linux/objpool.h create mode 100644 lib/objpool.c create mode 100644 lib/test_objpool.c delete mode 100644 include/linux/freelist.h