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=-2.1 required=3.0 tests=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,USER_AGENT_SANE_1 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 3F1EAC432C3 for ; Wed, 13 Nov 2019 19:02:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 774FD206D5 for ; Wed, 13 Nov 2019 19:02:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=inwind.it header.i=@inwind.it header.b="U8taimtC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728128AbfKMTCi (ORCPT ); Wed, 13 Nov 2019 14:02:38 -0500 Received: from smtp-32.italiaonline.it ([213.209.10.32]:57206 "EHLO libero.it" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726326AbfKMTCi (ORCPT ); Wed, 13 Nov 2019 14:02:38 -0500 X-Greylist: delayed 488 seconds by postgrey-1.27 at vger.kernel.org; Wed, 13 Nov 2019 14:02:37 EST Received: from venice.bhome ([94.38.75.109]) by smtp-32.iol.local with ESMTPA id UxmdiZy9jhCYOUxmdiFXSc; Wed, 13 Nov 2019 19:54:27 +0100 x-libjamoibt: 1601 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=inwind.it; s=s2014; t=1573671267; bh=tbXrutJujp0JW4rM1v2lF1MLzB/oD8Nf5aN32kGxgMQ=; h=Reply-To:Subject:To:Cc:References:From:Date:In-Reply-To; b=U8taimtCwt4AukwHM7yAD6W9uiqjY9Q967wdwx6R987GsQcnEMu/5kmARKFchGn/Q /OuGiLzS18enRMkX/0wVVFIYvdf46oia4+1meezizYk5cDbYQ9cduqLrCGO/zV2Kkp TiPyrZDQVBzY0QF5snY1w1bjptKOUVmHIX1KKCcHliaVn2hebP/v9oCBqYcHQEuOmt 4XBgzsrTsfyebtoC0kMHCnZH5MLRYSzzCYfsxriFfWMI2GGLgM7gmoCDSO6yAEs27o H3ahGZmeA8rN6zPuSXZAWkGeK1sRjMq656if4ikccrxBnQBGSxcJkRNfmxEinAtG+N w/kgFFnF9W6Lg== X-CNFS-Analysis: v=2.3 cv=D9k51cZj c=1 sm=1 tr=0 a=KzXHLLuG32F0DtnFfJanyA==:117 a=KzXHLLuG32F0DtnFfJanyA==:17 a=jpOVt7BSZ2e4Z31A5e1TngXxSK0=:19 a=IkcTkHD0fZMA:10 a=mzeZn2TJlUqas4qKeq0A:9 a=QEXdDO2ut3YA:10 Reply-To: kreijack@inwind.it Subject: Re: Does GRUB btrfs support log tree? To: Chris Murphy Cc: David Sterba , Andrei Borzenkov , Btrfs BTRFS References: <20191104193454.GD3001@twin.jikos.cz> From: Goffredo Baroncelli Message-ID: <4480d47f-1b1e-d99d-e480-b31220433340@inwind.it> Date: Wed, 13 Nov 2019 19:54:26 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-CMAE-Envelope: MS4wfH4nAi0EOAIHjMxdfKoxfLWJCp/Jt9cL04czvy+w6F+w7trDcIWxnlEr0uiorFKRBKqDCIuPwCgUDeaM78N8W/G85KXBPuJXqlxQnZxM+3pNTlCX3h9k sGewSQxUAM1+u/LCsi2i0nTw22yqQjBUbG2weyrrFbYsT0zdilCpez773BCHiga1qV4ITI+MoNEgG2Mtx3+dfZS0jIrU213d92EuN8ymwRpZt45lzxZ4CjQT tZBmoDw+KGi5pv0XwVvQYIOHJ3N5qUM193Q9rT9g9hY= Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On 13/11/2019 18.00, Chris Murphy wrote: >> The GRUB-fs should have the following main requirements: >> - allow the atomicity guarantee >> - allow molti-disk setup >> - allow grub to update some file (grubenv come me as first) >> - it should require a simple implementation (easy to porting to multiple system, which basically means linux, *bsd and solaris ?) >> - the speed should be not important > Plausibly we're most of the way there already, adapting the existing > "BIOS Boot" partition. > Unfortunately the BIOS Boot partition (which means basically FAT), doesn't have support for "atomicity" nor multidisk.. BR G.Baroncelli -- gpg @keyserver.linux.it: Goffredo Baroncelli Key fingerprint BBF5 1610 0B64 DAC6 5F7D 17B2 0EDA 9B37 8B82 E0B5