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=-3.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,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 C0ECAC2D0A3 for ; Wed, 4 Nov 2020 22:10:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4EA5220867 for ; Wed, 4 Nov 2020 22:10:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="KANFOam0" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731414AbgKDWKj (ORCPT ); Wed, 4 Nov 2020 17:10:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33436 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726777AbgKDWKj (ORCPT ); Wed, 4 Nov 2020 17:10:39 -0500 Received: from mail-lf1-x134.google.com (mail-lf1-x134.google.com [IPv6:2a00:1450:4864:20::134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 22D8FC0613D3; Wed, 4 Nov 2020 14:10:39 -0800 (PST) Received: by mail-lf1-x134.google.com with SMTP id e27so6409676lfn.7; Wed, 04 Nov 2020 14:10:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=Yk2mj75i8xa8ayUVBQ83JlZDKWwjs6t8SW4iIqQ0FL8=; b=KANFOam0HlCtXCJKxEuU+poGR57CGLU6/zmeHIPrjcjIfkW00DexlF9LqBPk1p5pXq vxp8ESNn3E0OZNZeYDdCUJSLW/qJZx22Cf416XUH8J3ANooFmsCb8UIwmcc5XL22E5kO 937DmY/OO5bps0pihshlNQy8MSGL+w5FjluXGJBdE9IkQZsYz85TASPkatJwHsR1x3in GZna+Lwq6va5sQtb6limwg+TU3Olwwbr5g1aaJKKfjcTOqYDdkXo6Hud1Jv0hxQJWGqg QA7HxRzsUkeCYRL5Acfx/1VySgVdi5cVudimmEe5fbvpuJpMu+QHbeNf0jKJT4xNcxk1 Up+w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=Yk2mj75i8xa8ayUVBQ83JlZDKWwjs6t8SW4iIqQ0FL8=; b=RKRRQGQ1mdFEiiLnOPCxy7sTYICFvpNtius7i4LYUaCEgiRkR2YKLOQ4k7lR8eRT3t GoMrOpFGrnevqrP2LqRmDvbiJdHrByjwrxwYEC3jjh1Hk4HLq6z9LWdt2yRImia8+038 MU09nqvTfT9G3uTDaId8hc36eJUnHtyICopwxOKMQ3DKDYC2SCxqRLoH0HqlRX5vhj0F jaIYQ5uE7qTnTfNN159h3N8+W+I1lrmtripd3JGa4OFB+w3gb9N9V95twEt5YNFD6moo d3k01mdtrxv0k+IXYMKLQQknvT+ycpVPyihHdGkE1HvoxZ8/39aIfhpNWO7ji++qMVoZ Ahbw== X-Gm-Message-State: AOAM531FWnPzNNsuuCg3DXku6FASwtlBXijA5zNzXQOZR3GXkWNCjBsq +tQ5+EmRZXpyZnmDFPsdzdex93TeLkyEsc2XUEM= X-Google-Smtp-Source: ABdhPJz5XSkiQ1cv/9X7KUiC72fGiP+TjMWeNoh7HI4hGLD2ZP40tU35M5i5UPWTJDnGhRPZVmqhsgMlFOMeEjT3+pc= X-Received: by 2002:ac2:5e83:: with SMTP id b3mr9823957lfq.119.1604527837537; Wed, 04 Nov 2020 14:10:37 -0800 (PST) MIME-Version: 1.0 References: <20201028132529.3763875-1-haliu@redhat.com> <20201029151146.3810859-1-haliu@redhat.com> <646cdfd9-5d6a-730d-7b46-f2b13f9e9a41@gmail.com> <3306d19c-346d-fcbc-bd48-f141db26a2aa@gmail.com> <71af5d23-2303-d507-39b5-833dd6ea6a10@gmail.com> <20201103225554.pjyuuhdklj5idk3u@ast-mbp.dhcp.thefacebook.com> <20201104021730.GK2408@dhcp-12-153.nay.redhat.com> <20201104031145.nmtggnzomfee4fma@ast-mbp.dhcp.thefacebook.com> In-Reply-To: From: Alexei Starovoitov Date: Wed, 4 Nov 2020 14:10:25 -0800 Message-ID: Subject: Re: [PATCHv3 iproute2-next 0/5] iproute2: add libbpf support To: Edward Cree Cc: Hangbin Liu , David Ahern , Daniel Borkmann , Andrii Nakryiko , Stephen Hemminger , Alexei Starovoitov , Martin KaFai Lau , Song Liu , Yonghong Song , David Miller , Jesper Dangaard Brouer , Networking , bpf , Jiri Benc , Andrii Nakryiko , =?UTF-8?B?VG9rZSBIw7hpbGFuZC1Kw7hyZ2Vuc2Vu?= Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org On Wed, Nov 4, 2020 at 1:16 PM Edward Cree wrote: > > On 04/11/2020 03:11, Alexei Starovoitov wrote: > > The user will do 'tc -V'. Does version mean anything from bpf loading pov? > > It's not. The user will do "ldd `which tc`" and then what? > Is it beyond the wit of man for 'tc -V' to output somethingabout > libbpf version? > Other libraries seem to solve these problems all the time, I > haven't seen anyone explain what makes libbpf so special that it > has to be different. slow vger? Please see Daniel and Andrii detailed explanations. libbpf is not your traditional library. Looking through the installed libraries on my devserver in /lib64/ directory I think the closest is libbfd.so Then think why gdb always statically links it.