Received: by 2002:a05:6358:d09b:b0:dc:cd0c:909e with SMTP id jc27csp4042220rwb; Sat, 12 Nov 2022 20:03:25 -0800 (PST) X-Google-Smtp-Source: AA0mqf6Y1Cog9vPN0sKbzC6mt/6RurirLqZtmik5KtmnYpa9nm9kvGLhD/G8xBFUaiHxSb+BzCH3 X-Received: by 2002:aa7:ca50:0:b0:461:9d22:348d with SMTP id j16-20020aa7ca50000000b004619d22348dmr6837329edt.76.1668312205675; Sat, 12 Nov 2022 20:03:25 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1668312205; cv=none; d=google.com; s=arc-20160816; b=kB8IfJxaBj5hVJ51CN9TK7IK/HxxCdgWKh4QJy3MB9ST9HVFGU6uTKyme30mLSCJKH xUZ5e76rfV86f978Q4ZyhNXFMlGnWybXPwb6wRnOr3qxqsnZATfAGXAJWZhQm42hDoie nFlfP6ps7rt43K6U0oFvtnohtrzGK/VbUlw6nbzevP7CZFiRauq7Jb0I2qZrYFBee+h5 dzWrWTfTwntyLPfHVXbBJAB8fp61uZtl0aNpm8Kq/LVvMATgjnHI30SL0gt6Bz+1gi2h NboweJqBL9Lgt59AIu+AGMigaeM05MUnj82tF8az/SuMiHyBBr52BeFs8Z8dQ8jNJB97 puig== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:in-reply-to:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :dkim-signature; bh=PFC/3gpZ/w6uCN7OIH1RY890hMXcXfGXd92XAeM8pJY=; b=UtEOVmONTjEApDJVY/H8t8jlfFwUnsQRQUgCtrIoq6MJSBLGe1Q9QFNl7MelumlJ3J unDIJkSfOvxgMzPuENoPJBLj47LSmkhcj6aawms541W9XaaXBJZD3bgzT9xz7C/RNw8H 8VdYsAQk16LcgB4tGUIEY6Afa+HwtLWbVLcCjdZiCiKYjsHbmnjvs2vuPm4IVldBXP/h iNlfWy8Dlsbs3fm7LkRVr6VpkjWnKLrTAWk1qb6lDSlx1xHa4hVHkF72lBkG3QImnckS /+qRcjd0ziifQeyTl63S6d6VrYETEjPkLHbKKjJK5Ju24TQbYvjv3xycNKAfK8trpQor r4JA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@infradead.org header.s=bombadil.20210309 header.b=Ny1dJjzG; 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=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id d16-20020a056402401000b00457d6203a0bsi5916070eda.62.2022.11.12.20.02.48; Sat, 12 Nov 2022 20:03:25 -0800 (PST) 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=@infradead.org header.s=bombadil.20210309 header.b=Ny1dJjzG; 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=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233054AbiKMCop (ORCPT + 89 others); Sat, 12 Nov 2022 21:44:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51438 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231252AbiKMCom (ORCPT ); Sat, 12 Nov 2022 21:44:42 -0500 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2C03511146; Sat, 12 Nov 2022 18:44:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=PFC/3gpZ/w6uCN7OIH1RY890hMXcXfGXd92XAeM8pJY=; b=Ny1dJjzGyl4ZWzd34xFjfvi7ac rKKtpQ0qL2nD4hxEyZB2x0V2IXXLrRo0olJYKASn7Be+O8UNBjMwojK7ZIEfvAi5GCH1POJxXrfB1 PODWL7PxfXn/Mz1WzB8Kvg6FAthsp39/8IUZZRO6zLeRTU/26PHAQX+Zl42K/xF09udZlAmZF6OZ9 OSBcyufEPZKs6WndMhGQ0Ii4YUTWEcxL6a/ZGpNIjJsN3fT8pW2tAdQD3fTRQNe7MSCzcZhmcQ3/d TJ+nVkQgohLawzY8YG5FIrarkP1/z+6ewSSTZPGTIVEQsrHBpDRmpV6+QMYq+IjhaO/0Hk1s50zdz MoXR3tzQ==; Received: from mcgrof by bombadil.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1ou2yw-009APa-FH; Sun, 13 Nov 2022 02:44:26 +0000 Date: Sat, 12 Nov 2022 18:44:26 -0800 From: Luis Chamberlain To: Zhen Lei Cc: Josh Poimboeuf , Jiri Kosina , Miroslav Benes , Petr Mladek , Joe Lawrence , live-patching@vger.kernel.org, linux-kernel@vger.kernel.org, Masahiro Yamada , Alexei Starovoitov , Jiri Olsa , Kees Cook , Andrew Morton , linux-modules@vger.kernel.org, Steven Rostedt , Ingo Molnar , David Laight Subject: Re: [PATCH v8 0/9] kallsyms: Optimizes the performance of lookup symbols Message-ID: References: <20221102084921.1615-1-thunder.leizhen@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20221102084921.1615-1-thunder.leizhen@huawei.com> Sender: Luis Chamberlain X-Spam-Status: No, score=-4.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE 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 On Wed, Nov 02, 2022 at 04:49:12PM +0800, Zhen Lei wrote: > v7 --> v8: > Sort the symbols by name and implement kallsyms_lookup_name() using a binary > search. The performance is more than 20 times higher than that of v7. Of course, > the memory overhead is also extended to (3 * kallsyms_num_syms) bytes. Discard > all implementations of compression and then comparison in v7. > > In addition, all sparse warnings about kallsyms_selftest.c are cleared. Awesome work, I can't find a single thing I hate about this, but my biggest conern is the lack of testing so I'm going to merge this to