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 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3A6F4C61DA4 for ; Thu, 16 Feb 2023 12:32:12 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pSdQh-0002kx-S5; Thu, 16 Feb 2023 07:32:03 -0500 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 1pSdQg-0002kd-Us for qemu-devel@nongnu.org; Thu, 16 Feb 2023 07:32:02 -0500 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 1pSdQf-0001M8-Cz for qemu-devel@nongnu.org; Thu, 16 Feb 2023 07:32:02 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1676550720; 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: in-reply-to:in-reply-to:references:references; bh=PxlNGKMauHxl5fw7O5sTwwtjumwyORjosdW9on7IClM=; b=VDs3Ebtf9RbwkfWGKkxR+Ga4hUPsR13/PCFJ6FVJEsIlI4BxYQxBIhV645iT44P1QTtKyA fHOeCr9m4bpUm6Sa11N/YhYdBDb6NNnibI6IxQqDKrkTjtvSq/Nclbfw4a+rApPnpKt9Jl b+Mjx8zCTfxmY/R+Ol674fjUNBDSPKA= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-550-K3YlJYDoN5yH9SMfQA2paw-1; Thu, 16 Feb 2023 07:31:57 -0500 X-MC-Unique: K3YlJYDoN5yH9SMfQA2paw-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 26AEB802C16; Thu, 16 Feb 2023 12:31:57 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.39.192.13]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 04709C15BA0; Thu, 16 Feb 2023 12:31:57 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id C309F21E6A1F; Thu, 16 Feb 2023 13:31:55 +0100 (CET) From: Markus Armbruster To: Peter Maydell Cc: qemu-devel@nongnu.org, John Snow , Cleber Rosa , Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= , Thomas Huth , Daniel Berrange , Beraldo Leal , Michael Roth , Wainer dos Santos Moschetta , Paolo Bonzini , qemu-block@nongnu.org, Hanna Reitz , Alex =?utf-8?Q?Benn=C3=A9e?= , Kevin Wolf Subject: Re: [PATCH v2 0/7] Python: Drop support for Python 3.6 References: <20230210003147.1309376-1-jsnow@redhat.com> <87v8k2ycjb.fsf@pond.sub.org> Date: Thu, 16 Feb 2023 13:31:55 +0100 In-Reply-To: (Peter Maydell's message of "Thu, 16 Feb 2023 10:17:02 +0000") Message-ID: <875yc1rdtw.fsf@pond.sub.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 3.1 on 10.11.54.8 Received-SPF: pass client-ip=170.10.133.124; envelope-from=armbru@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_H2=-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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Peter Maydell writes: > On Wed, 15 Feb 2023 at 19:05, Markus Armbruster wrote: >> >> The discussion under PATCH 6 makes me think there's a bit of confusion >> about the actual impact of dropping support for Python 3.6. Possibly >> because it's spelled out in the commit message of PATCH 7. Let me >> summarize it in one sentence: >> >> *** All supported host systems continue to work *** >> >> Evidence: CI remains green. >> >> On some supported host systems, different packages need to be installed. >> On CentOS 8, for instance, we need to install Python 3.8.13 or 3.9.16 >> instead of 3.6.8. Let me stress again: same repository, different >> package. No downsides I can see. > > Yes; I never had any issues with this part of it. If there was > a "Sphinx that also used that Python" in that repo, the answer > would be easy. > >> The *one* exception is Sphinx on CentOS 8. CentOS 8 does not ship a >> version of Sphinx that works with Python 3.7 or newer. This series >> proposes to simply stop building the docs there, unless the user >> provides a suitable version of Sphinx (which is easy enough with pip). >> That's PATCH 7. > > Yes; this brings CentOS 8 down from "fully supported" to "kinda > supported but not for everything", which is less than ideal. I acknowledge there's a difference between "you need to dnf install python-sphinx to be able to build docs" and "you need to pip install sphinx to be able to build docs", and that the difference is negligible in some scenarios, and a show stopper in others. I wasn't fully aware of the latter. > I think the level of not-idealness of that side of the scales > is probably clear enough. The difficulty I think for those who > haven't had their arms deep in QEMU's Python code is not having > the background info to be able to weigh up how heavy the other side > of the tradeoff scales is (since the naive "well, just keep writing > Python 3.6 for the moment" take is clearly wrong). Fair point. I hope the situation is more clear now.