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 X-Spam-Level: X-Spam-Status: No, score=-6.3 required=3.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 68607C388F9 for ; Wed, 11 Nov 2020 18:33:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 054102076E for ; Wed, 11 Nov 2020 18:33:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Z57vWhy9" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726570AbgKKSdJ (ORCPT ); Wed, 11 Nov 2020 13:33:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44064 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726235AbgKKSdJ (ORCPT ); Wed, 11 Nov 2020 13:33:09 -0500 Received: from mail-qk1-x744.google.com (mail-qk1-x744.google.com [IPv6:2607:f8b0:4864:20::744]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4C70EC0613D1; Wed, 11 Nov 2020 10:33:09 -0800 (PST) Received: by mail-qk1-x744.google.com with SMTP id y197so2634416qkb.7; Wed, 11 Nov 2020 10:33:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:user-agent:in-reply-to:references:mime-version :content-transfer-encoding:subject:to:cc:from:message-id; bh=gavp6tNqWuRZ+zWPhGuAXVWSO+tjwIuRUlDIDkI3FGQ=; b=Z57vWhy9FFCAy78wImJ/7EL/rv/A8r21UzG+vsL9vWTxNtxrH+HtbhOPelRzNKPnob i7CFXoizhYauOIf1rNJFz4sTC+ful7l/Jra5llIOB81huO+LGDFM0vAYnrG+62cFsAOR CMlUJcN9vvtflklO+tdIG/CZSHJTyOZDKWMt29g32eH7fbiD7EIA1W6IQbTr8mE/B7Ia DyxTpnAdr3pXheTySA/OawLFawQQ6OOx6FXKqKEXqQ1AQpOjnc4UK4pvVkJvnQ3o1XPC vrw/qD2HVLQM3dwzUFrkkGx6XlrZztF0bcb/s1/dADhBDztmmr0hfkpPaV216f/ZGo7D Xk5w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:user-agent:in-reply-to:references :mime-version:content-transfer-encoding:subject:to:cc:from :message-id; bh=gavp6tNqWuRZ+zWPhGuAXVWSO+tjwIuRUlDIDkI3FGQ=; b=KmZvpbQxogdQjwA0GHqFFfEQ1E4Vg+exeugDUq2TspaHe6JDp130ASkvuJpjOVkw9a Uv9Ki3uCrZVJQOstxLSkktHijF11WTCNMVr3j1HgW0rYpQ6sPoyqWx+lZh7Aaq0k7TAC Pa4Q38PLydNP4s84wV+4S92M2R73LEy493Ck9KwKU7/MQ6biy4/K5Y5AUY62+xqdfLty xhMsCNa5n7Vp4QFfj7g33nNvP5U3KsKO5mKA+7owl4fDHpODI96WlgojC/hOtdLQnSI7 uuCAQ5F01jQWL/Ug4g/lO7LVxlunDnTbo6pztCaF7qGNwtjxdUIUwJVGAeJInPH+qDvJ 0zFw== X-Gm-Message-State: AOAM533MVBnBGTfLo1b/Mgp8RqcjpmYhQj3TUfXFZJ4Fvd7/cuDXzvkT YZNhAm9LCC4QQaVMDCoHTXFSpBIxnE4= X-Google-Smtp-Source: ABdhPJy65TFbOXart7fZqwKuq1nJEFobwv7XpkQrp9+omLxrnyRhdediRJD+Oih+9dBFY8a1cSHIXQ== X-Received: by 2002:a37:9c83:: with SMTP id f125mr26818895qke.149.1605119588483; Wed, 11 Nov 2020 10:33:08 -0800 (PST) Received: from [172.29.31.236] ([187.68.204.65]) by smtp.gmail.com with ESMTPSA id o16sm2969608qkg.27.2020.11.11.10.33.06 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 11 Nov 2020 10:33:07 -0800 (PST) Date: Wed, 11 Nov 2020 15:32:43 -0300 User-Agent: K-9 Mail for Android In-Reply-To: References: <20201106052549.3782099-1-andrii@kernel.org> <20201106052549.3782099-5-andrii@kernel.org> <20201111115627.GB355344@kernel.org> <20201111121946.GD355344@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Subject: Re: [PATCH dwarves 4/4] btf: add support for split BTF loading and encoding To: Andrii Nakryiko , Arnaldo Carvalho de Melo CC: Andrii Nakryiko , dwarves@vger.kernel.org, bpf , Kernel Team , Jiri Olsa , Namhyung Kim From: Arnaldo Message-ID: Precedence: bulk List-ID: X-Mailing-List: dwarves@vger.kernel.org On November 11, 2020 3:29:32 PM GMT-03:00, Andrii Nakryiko wrote: >On Wed, Nov 11, 2020 at 4:19 AM Arnaldo Carvalho de Melo > wrote: >> >> Em Wed, Nov 11, 2020 at 08:56:27AM -0300, Arnaldo Carvalho de Melo >escreveu: >> > >> > The entry for btf_encode/-J is missing, I'll add in a followup >patch=2E >> > >> > Also I had to fixup ARGP_btf_base to 321 as I added this, to >simplify >> > the kernel scripts and Makefiles: >> > >> > $ pahole --numeric_version >> > 118 >> > $ >> >> Added this: >> >> [acme@five pahole]$ git diff >> diff --git a/man-pages/pahole=2E1 b/man-pages/pahole=2E1 >> index 20ee91fc911d4b39=2E=2Ef44c649924383a32 100644 >> --- a/man-pages/pahole=2E1 >> +++ b/man-pages/pahole=2E1 >> @@ -181,6 +181,14 @@ the debugging information=2E >> =2EB \-\-skip_encoding_btf_vars >> Do not encode VARs in BTF=2E >> >> +=2ETP >> +=2EB \-J, \-\-btf_encode >> +Encode BTF information from DWARF, used in the Linux kernel build >process when >> +CONFIG_DEBUG_INFO_BTF=3Dy is present, introduced in Linux v5=2E2=2E Us= ed >to implement >> +features such as BPF CO-RE (Compile Once - Run Everywhere)=2E >> + >> +See \fIhttp://vger=2Ekernel=2Eorg/bpfconf2019_talks/bpf-core=2Epdf\fR= =2E > >Can you please point to [0] instead? That linked Sure=2E > presentation is >already a bit out of date and will bitrot much faster=2E Blog post has >at least a chance at being updated with relevant important stuff=2E Plus >it has links both to the bpfconf2019 presentation, as well as some >other resources (including your presentation)=2E > > [0] https://nakryiko=2Ecom/posts/bpf-portability-and-co-re/ --=20 Sent from my Android device with K-9 Mail=2E Please excuse my brevity=2E