From mboxrd@z Thu Jan 1 00:00:00 1970 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 C0B8DC41513 for ; Thu, 12 Oct 2023 06:19:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377393AbjJLGTZ (ORCPT ); Thu, 12 Oct 2023 02:19:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48010 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1377391AbjJLGTV (ORCPT ); Thu, 12 Oct 2023 02:19:21 -0400 Received: from mail-ed1-x534.google.com (mail-ed1-x534.google.com [IPv6:2a00:1450:4864:20::534]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0535DCC for ; Wed, 11 Oct 2023 23:19:20 -0700 (PDT) Received: by mail-ed1-x534.google.com with SMTP id 4fb4d7f45d1cf-53b8f8c6b1fso1077519a12.0 for ; Wed, 11 Oct 2023 23:19:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1697091558; x=1697696358; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:from:to:cc:subject:date:message-id :reply-to; bh=OP6CltxnY4Me7Dc35n6Y2Bjbp3x6k8MvTeVPFVgLbUU=; b=JrpF20nG0NeQS9N2jllu71jtRtwDuY0MYv1Mx8nIuSFFDK1i+QwOwZdVMhFx2KnLKj 59fOZY2YutA3x9YcOd6T1G5H1VL+ie6JQ4UZBUnXMwEUK/8SizaXNA4RV+UGevynDWEF nC2stWqp99Rl+kj1lhgsrPf942M4wUHaOCrAzldYuThKhrGTm4X2yFjfUJM8ziQ2CG9L W8agLKMSftkKNatM6wF6ZucACp0WZEVeUIvix7SW77ZVyQjuz0iF/39MJT5yiOGIMa/h msI/guBk/PRJMcsO7TfM0gg+T9zANzD2j5TIw6AXiQCe3ygkHuR1h5WKygLMLOLIMpJL VDIw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697091558; x=1697696358; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=OP6CltxnY4Me7Dc35n6Y2Bjbp3x6k8MvTeVPFVgLbUU=; b=B/CoPNlAvghDP4dJgkoMgH8nCz92uPk0AcUsjjPR14Rur1Lt3ke/M3h4zd1ut1Hcxb VPAjQawViyhAhsfXse91vTyolZ8URPmkw4w30KHk8kN1dg+Ja0eMvj5R/XSAQuwNU/2p O5nOA0yAI3KiSBEIwqbqLNVNzZip0kOCRKHss2PKYwr2e4+MgKSK77dmkx4Wt/Z2Ar+l 36MN/s4zrqb+u57uN/RkjV3zABCWop9WcrtcQiDSJvD9HY8nUWPDZDyE2HAbd+qfVDkX c+zDRhwG/bm34Q2tiyzYuNEBIaRWABWRejqZoKNanQGdSmhgZkOsTBwEV/jZBPQWp+u/ dxVQ== X-Gm-Message-State: AOJu0YzjIlvpVNTwsgH0UpZ+DVmb9aFcVhM6dMAkRNXNE5qsQbVuSFeo 2IeNFgmyYtL3u3RT8JinPFM= X-Google-Smtp-Source: AGHT+IFq2FiZlj4uG5+xGmhwb55BL1RglItA0tzU9sTuMidOYUaP2+qnKDe6r7rwkj8VoXLtN8i8kw== X-Received: by 2002:a17:906:318e:b0:9b2:d554:da0e with SMTP id 14-20020a170906318e00b009b2d554da0emr18382302ejy.69.1697091558223; Wed, 11 Oct 2023 23:19:18 -0700 (PDT) Received: from gmail.com (1F2EF405.nat.pool.telekom.hu. [31.46.244.5]) by smtp.gmail.com with ESMTPSA id j16-20020a170906051000b0099bcf1c07c6sm10688100eja.138.2023.10.11.23.19.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Oct 2023 23:19:16 -0700 (PDT) Sender: Ingo Molnar Date: Thu, 12 Oct 2023 08:19:14 +0200 From: Ingo Molnar To: Josh Poimboeuf Cc: "H. Peter Anvin" , Linus Torvalds , Uros Bizjak , x86@kernel.org, linux-kernel@vger.kernel.org, Nadav Amit , Andy Lutomirski , Brian Gerst , Denys Vlasenko , Peter Zijlstra , Thomas Gleixner , Josh Poimboeuf Subject: Re: [PATCH v2 -tip] x86/percpu: Use C for arch_raw_cpu_ptr() Message-ID: References: <9b71932a-d410-4b92-b605-d6acc5d35069@zytor.com> <20231012013507.jrqnm35p7az6atov@treble> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20231012013507.jrqnm35p7az6atov@treble> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Josh Poimboeuf wrote: > Though, another problem is that .text has a crazy amount of padding > which makes it always the same size, due to the SRSO alias mitigation > alignment linker magic. We should fix that somehow. We could emit a non-aligned end-of-text symbol (we might have it already), and have a script or small .c program in scripts/ or tools/ that looks at vmlinux and displays a user-friendly and accurate list of text and data sizes in the kernel? And since objtool is technically an 'object files tool', and it already looks at sections & symbols, it could also grow a: objtool size command that does the sane thing ... I'd definitely start using that, instead of 'size'. /me runs :-) Thanks, Ingo