From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-6.1 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id B85727D04D for ; Tue, 16 Apr 2019 17:22:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729468AbfDPRWv (ORCPT ); Tue, 16 Apr 2019 13:22:51 -0400 Received: from mail-lj1-f194.google.com ([209.85.208.194]:38707 "EHLO mail-lj1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727180AbfDPRWv (ORCPT ); Tue, 16 Apr 2019 13:22:51 -0400 Received: by mail-lj1-f194.google.com with SMTP id p14so19843918ljg.5 for ; Tue, 16 Apr 2019 10:22:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=joelfernandes.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=teLrKWBJL8PYLLheXxLHFCByZ+NGmGgF48F54jGmNmU=; b=NR1FsJ7cAE+Yhvw6jJ92R3jwPdAFWhBkmWNekvPM0VQugn4LtIkbgJdQ25zvJ31/s6 EbAsB91gYIvJNKcsOJwyE3t4c9rtdAlNwp+anCsc0fYhptrZcarbrnfheOkROLuxzgmk zST7fuy0QSXlySwG2fvxvBU3UINxkvGuufenA= 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=teLrKWBJL8PYLLheXxLHFCByZ+NGmGgF48F54jGmNmU=; b=sLEb5McZkyiLPELRFmmqRTvTiwBUyjGyMzB7uogftL0YBPiOd3551QvKLduHW7ucFG r7davzyYtVeOLHF5v7AmTTeovBo10DAQF51a7fLLXeXdDzXUqRODkhKUM0KmP7cSj1nP 9H1D8848SZJthO0zymumikDSF+oG9Z0P0Bf95eY+woAKuhVLGzc2tmORM79E77MIEn1K K19uPTXUQ348dnhzrLzCaLA92MqnumE/UwVu4/HYmH89RfMM9BqROj/Hr9h6GdcK33jp 7vAgvGgYXlQn30TbiCbfW32tkKlbJYJ+L0nNcfNmmSu6WATgFofr6Vs8/gGLEEZSRVyb xCYg== X-Gm-Message-State: APjAAAWvwDBBX/4soqs6QSCGnczwL6B+SupB2miFYxwIsNgHLiAKrCKV RU9LP0OPNJVnuov28V9Me+w4QX5HRoW7onghSinUJw== X-Google-Smtp-Source: APXvYqxZteqC8ERtgpAkWtZFuixQenPXlZ5ha+FDwpWOAVUTWKODqK1kWk7yAc4GvI7EbPzn7ayGGpGjIsXiUNdmUr4= X-Received: by 2002:a2e:3803:: with SMTP id f3mr46633107lja.165.1555435369399; Tue, 16 Apr 2019 10:22:49 -0700 (PDT) MIME-Version: 1.0 References: <20190411031540.ehezr6kq7ouobpzx@ast-mbp.dhcp.thefacebook.com> <20190415104109.64d914f3@gandalf.local.home> <20190416083306.5646a687@gandalf.local.home> <20190416124939.GB6027@kroah.com> <20190416130440.GA7944@localhost> <20190416094509.1af6326b@gandalf.local.home> <20190416142240.GA31920@kroah.com> <20190416164642.krptlz32zusr4pgn@ast-mbp.dhcp.thefacebook.com> In-Reply-To: From: Joel Fernandes Date: Tue, 16 Apr 2019 13:22:38 -0400 Message-ID: Subject: Re: [PATCH v5 1/3] Provide in-kernel headers to make extending kernel easier To: Olof Johansson Cc: Alexei Starovoitov , Greg Kroah-Hartman , Steven Rostedt , Karim Yaghmour , Kees Cook , Joel Fernandes , Linux Kernel Mailing List , Qais Yousef , Dietmar Eggemann , Manoj Rao , Andrew Morton , Alexei Starovoitov , atish patra , Daniel Colascione , Dan Williams , Guenter Roeck , Jonathan Corbet , Android Kernel Team , "open list:DOCUMENTATION" , "open list:KERNEL SELFTEST FRAMEWORK" , linux-trace-devel@vger.kernel.org, Masahiro Yamada , Masami Hiramatsu , Randy Dunlap , Shuah Khan , Yonghong Song Content-Type: text/plain; charset="UTF-8" Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org On Tue, Apr 16, 2019 at 12:57 PM Olof Johansson wrote: [snip] > > Where kheaders.tar.xz is placed doesn't really matter. > > /proc or /sys/kernel makes no real difference. > > If done in a location that isn't a perpetual ABI commitment, a tarball > solution is something we can work with. This is the part I don't get, Olof. It has to be an ABI commitment so that the tools always work. Why are we so interested in breaking userspace tools? We want a robust solution, not a fragile one. thanks, - Joel