From patchwork Wed Oct 18 11:28:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Juan Quintela X-Patchwork-Id: 1850738 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=ZUwID3aQ; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=patchwork.ozlabs.org) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4S9TCG62g2z20Zj for ; Wed, 18 Oct 2023 22:29:30 +1100 (AEDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qt4jL-0003jX-7Z; Wed, 18 Oct 2023 07:28:51 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qt4jD-0003eT-Dc for qemu-devel@nongnu.org; Wed, 18 Oct 2023 07:28:43 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qt4jB-0005cq-Gb for qemu-devel@nongnu.org; Wed, 18 Oct 2023 07:28:43 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1697628521; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=i2D2jZX3xzsm+mIYwcT+Bj6LW/d3j1ho52V8Cq4E4kw=; b=ZUwID3aQNpBfpKlbMl6QUg7M3W0Xwu0mH05PeVmTvUXt/bnP/gvjKG2fCUM75AxEe2Z0tp F7WG97LDCu/Wq/VCDhA224l2+H4XQU+WJmgjLhpj9VwvOqOsVDQLUM1OYuioMY6fV1C2aT zKLBjMUVmdRu79O/+5iZslSig42HPAc= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-196-XJRZ_b3nO26d3ChjS6nCPQ-1; Wed, 18 Oct 2023 07:28:29 -0400 X-MC-Unique: XJRZ_b3nO26d3ChjS6nCPQ-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id EC0F83823324; Wed, 18 Oct 2023 11:28:28 +0000 (UTC) Received: from secure.mitica (unknown [10.39.194.127]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0682B492BEE; Wed, 18 Oct 2023 11:28:27 +0000 (UTC) From: Juan Quintela To: qemu-devel@nongnu.org Cc: Juan Quintela , Peter Xu , Leonardo Bras , Fabiano Rosas Subject: [PATCH v4 0/4] Migration documentation Date: Wed, 18 Oct 2023 13:28:23 +0200 Message-ID: <20231018112827.1325-1-quintela@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.9 Received-SPF: pass client-ip=170.10.133.124; envelope-from=quintela@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Hi on this v4: - Add ..contents - Address all comments - Create a new Backwards Compatibility section at the end of the file for this. Please review. Thanks, Juan. Continuing on my saga to not have a pointer about how migration works/should work, this are the doc for the long mails that I had to do last week: 1 - Document how backwards compatibility is supposed to work (that is what it was on v1 and v2) 2 - Document how to handle features that depend of things outside of qemu a.k.a. we make this a libvirt/management app problem. 3 - Document how we are supposed to fix backwards compatibility brokenness. You can see that I was able to find commits on tree to illustrate 1 and 3. The problem for 2 appeared from a discussion with Avihai about future vfio devices. Do anyone have a good idea about a commit already on tree to document it? Please review. Later, Juan. Juan Quintela (4): migration/doc: Add contents migration/doc: Add documentation for backwards compatiblity migration/doc: How to migrate when hosts have different features migration/doc: We broke backwards compatibility docs/devel/migration.rst | 520 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 520 insertions(+)