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 1D336C27C77 for ; Wed, 12 Jun 2024 12:22:30 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sHMyy-0008M0-5m; Wed, 12 Jun 2024 08:21:40 -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 1sHMyx-0008Fu-61 for qemu-devel@nongnu.org; Wed, 12 Jun 2024 08:21:39 -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 1sHMyv-0000pf-Dc for qemu-devel@nongnu.org; Wed, 12 Jun 2024 08:21:38 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1718194896; h=from:from:reply-to: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: in-reply-to:in-reply-to:references:references; bh=n7CDhDPyqGI/oQW+SY5e2xEwfZDZmaFiBhHRolwjXz0=; b=QzMunhEtJwz47uUomb9EsLRZVmiL/D2gFMb2pyXlqA2lnMCR10F8aaN8fQHJ3F9OliJD// DZmpx7D6hXPTzjghPqLAzCulRr8WIFNs8AKAVHukUj3EDQWmuTmRKJXQd46WwnNJgsbBr5 QBJ0W1W8J16fryFp5bX/wRc4iQ5FGOY= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-504-fQAnWiJ_Oqea8zvEx3CtHA-1; Wed, 12 Jun 2024 08:21:35 -0400 X-MC-Unique: fQAnWiJ_Oqea8zvEx3CtHA-1 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id F154719560B3; Wed, 12 Jun 2024 12:21:32 +0000 (UTC) Received: from redhat.com (unknown [10.42.28.115]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 4FABF30000C4; Wed, 12 Jun 2024 12:21:30 +0000 (UTC) Date: Wed, 12 Jun 2024 13:21:26 +0100 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Paolo Bonzini Cc: Alexander Monakov , qemu-devel@nongnu.org, Richard Henderson Subject: Re: [PATCH 0/5] Reinstate ability to use Qemu on pre-SSE4.1 x86 hosts Message-ID: References: <20240612105525.8795-1-amonakov@ispras.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/2.2.12 (2023-09-09) X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Received-SPF: pass client-ip=170.10.133.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: 11 X-Spam_score: 1.1 X-Spam_bar: + X-Spam_report: (1.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.143, 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_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_SBL_CSS=3.335, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no 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: , Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Wed, Jun 12, 2024 at 01:51:31PM +0200, Paolo Bonzini wrote: > On Wed, Jun 12, 2024 at 1:38 PM Daniel P. Berrangé wrote: > > This isn't anything to do with the distro installer. The use case is that > > the distro wants all its software to be able to run on the x86_64 baseline > > it has chosen to build with. > > Sure, and they can patch the packages if their wish is not shared by > upstream. Alternatively they can live with the fact that not all users > will be able to use all packages, which is probably already the case. Yep, there's almost certainly scientific packages that have done optimizations in their builds. QEMU is slightly more special though because it is classed as a "critical path" package for the distro. Even the QEMU linux-user pieces are now critical path, since they're leveraged by docker & podman for running foreign arch containers. > Or drop QEMU, I guess. Has FeSCO ever expressed how strict they are > and which of the three options they'd pick? I don't know - i'm going to raise this question to find out if there's any guidance. > Either way, this only affects either the QEMU maintainers for the > distro, or the users of QEMU. It's only if the installation media used > QEMU, that this change would be actively blocking usage of the distro > on old processors. With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|