From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by 2002:a17:907:1627:b0:8ed:b3f:fd98 with SMTP id hb39csp5531214ejc; Tue, 28 Feb 2023 00:59:52 -0800 (PST) X-Google-Smtp-Source: AK7set9JAKJrQ3sgv9FcTPirWSJjiujtBP2Q7DNlZrU+PT8gPxiEcxibgpVePBhR2DCOZRZVj067 X-Received: by 2002:a05:622a:1a85:b0:3b6:2e9b:cf2b with SMTP id s5-20020a05622a1a8500b003b62e9bcf2bmr3877710qtc.14.1677574791996; Tue, 28 Feb 2023 00:59:51 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1677574791; cv=none; d=google.com; s=arc-20160816; b=kvwaK1BFuQ2DDQIfSIB6rJVPT5SapH9ByqYEuy5//VBeJMWyi6Skvb/dezkYuJ1+8c h1yuEufUgBl0JrH4S+JLXy82nocSGPP/c2ytIpKhA61dUMQBoAQ4khseAKNO1xWArrsM R74R+RyQ0MehZ5qNW6eef7zFetAqb/5Wmtmdh6HJWryLDFdCgf2ol+G/+I7RDLLQA8ch jBQ5oAaz0LbE2Pj0kOvuou3a+SEkrw2cVYWkXoB5OyBsisaiVSnioqAXVJrNFugVyX+W FUkSjFKeSvw0eQApsct5hwSyv/uYR3I0uubM3pSJjNEtzAFCOlKmUKps1xdjXyyw3wBU qAsg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:content-disposition:in-reply-to :mime-version:references:message-id:subject:cc:to:from:date :dkim-signature; bh=gh14Q5XVK57GCqNInt9dvGWviONbEUABlkLCEvFo+1A=; b=LwHkA+SioJi4kaZxTmNPOltgmGUQV8MNHNRmobAO911xA1Gm7AwL3Oh6PhTrz+yKgn P/5/mU10RLNYflZyEpogVWMSbCd9GXvFjl73E5gSmCEvsCabb+oG5YEPB78b+8wVhuDg Knux0ywqRKsm4Ric2Eu3fTAZusYhOs8ygQ/Eop5eUDGhWrQ/e93Ala4rh68s1iKjn3bA 1vQvIgNZiYPj8MEHouomGcOdMcz8Hqft83HgcNpWSFyYxETQGSURnuS9GTXe0lEOH4Eq tnKpRTJvqDPsuovV6rRSsp1yq6rAajktdLWERPkQ55n6nLXwJQb0JAWQeuYPxYYm8vgm p97w== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=NgGWSbfY; spf=pass (google.com: domain of mst@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=mst@redhat.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com. [170.10.133.124]) by mx.google.com with ESMTPS id w10-20020a05622a190a00b003b1089eccc7si8545773qtc.582.2023.02.28.00.59.51 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 28 Feb 2023 00:59:51 -0800 (PST) Received-SPF: pass (google.com: domain of mst@redhat.com designates 170.10.133.124 as permitted sender) client-ip=170.10.133.124; Authentication-Results: mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=NgGWSbfY; spf=pass (google.com: domain of mst@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=mst@redhat.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1677574791; 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: in-reply-to:in-reply-to:references:references; bh=gh14Q5XVK57GCqNInt9dvGWviONbEUABlkLCEvFo+1A=; b=NgGWSbfYe9XsSyU4Fbm3QviohhQGjoS3hZuEtKh6KOu04ufUFE1KB8/YwDkg43ZtfSpJqo dbL1IdhhEIlvXk/kwPfNRLFiFyL8DCBcyQXUsOSscZNFTV87GHt8nS0q08p3i365UOjHeF hrhVM9tMvyr8C+hp9QdEV3VtmVa2jkk= Received: from mail-ed1-f69.google.com (mail-ed1-f69.google.com [209.85.208.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_128_GCM_SHA256) id us-mta-608-VkdylblbOkGWEi9JMpylhA-1; Tue, 28 Feb 2023 03:59:50 -0500 X-MC-Unique: VkdylblbOkGWEi9JMpylhA-1 Received: by mail-ed1-f69.google.com with SMTP id g33-20020a056402322100b004b0e54e03acso12100949eda.8 for ; Tue, 28 Feb 2023 00:59:50 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1677574789; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=gh14Q5XVK57GCqNInt9dvGWviONbEUABlkLCEvFo+1A=; b=AT94FeCcvAqxUayzwKtEQ1HbZ+6v6oa/lxPn3Yyli0A6QtddLuE4xxEQqkEQIrzdZp ccDcbtf1I/yCu2JCNUbwfsQvxEUc+AkhX3UcaQYXSBZUFW+76t3WBTNJ/RGuh0f/x6L8 YMYlQ15+mTN/iBB4itOt2eCPwSzFIxveXjkPIC9q4SxEtCGu0ZNhZpD43oOYn3XGWou5 aK6cXqdJrFDVVm1hvlueJrjE2KLMkX+PUiQ0H7cCljptQlaCDaMpduOH1dCoiYJr2Pqw MchgMTEKDK+jtN77mKrp0QIPgW3B+qvn5sQAk+TSOHm/fvHdkh8yPN1BN+dhG52IPSbN ztHA== X-Gm-Message-State: AO0yUKW6f1sdDE+KEoLVm4/dDEr6HZd096ucQYDq13vTHomRSpMbDDL1 sX1LcewYdijSJ8AL8v/wgdIPk7WyMql06ikFsNei8vgmEsIdM+/4flNkM/6alY5e9gAPRMmQI/B c8ihEeJwLvl06UAGP X-Received: by 2002:a17:906:264d:b0:8b1:79d0:bc58 with SMTP id i13-20020a170906264d00b008b179d0bc58mr1697104ejc.16.1677574789514; Tue, 28 Feb 2023 00:59:49 -0800 (PST) X-Received: by 2002:a17:906:264d:b0:8b1:79d0:bc58 with SMTP id i13-20020a170906264d00b008b179d0bc58mr1697089ejc.16.1677574789259; Tue, 28 Feb 2023 00:59:49 -0800 (PST) Return-Path: Received: from redhat.com ([2.52.141.194]) by smtp.gmail.com with ESMTPSA id ha14-20020a170906a88e00b008c405ebc32esm4229508ejb.28.2023.02.28.00.59.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Feb 2023 00:59:48 -0800 (PST) Date: Tue, 28 Feb 2023 03:59:44 -0500 From: "Michael S. Tsirkin" To: Richard Henderson Cc: Daniel =?iso-8859-1?Q?P=2E_Berrang=E9?= , Thomas Huth , qemu-devel@nongnu.org, Peter Maydell , Paolo Bonzini , Markus Armbruster , Alex =?iso-8859-1?Q?Benn=E9e?= , qemu-arm@nongnu.org, Maxim Levitsky , libvir-list@redhat.com, xen-devel@lists.xenproject.org, Reinoud Zandijk , Marcel Apfelbaum Subject: Re: [PATCH 1/2] docs/about: Deprecate 32-bit x86 hosts and qemu-system-i386 Message-ID: <20230228035917-mutt-send-email-mst@kernel.org> References: <20230227111050.54083-1-thuth@redhat.com> <20230227111050.54083-2-thuth@redhat.com> <20230227150858-mutt-send-email-mst@kernel.org> MIME-Version: 1.0 In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit X-TUID: LXNm/XN5kRJN On Mon, Feb 27, 2023 at 10:21:14AM -1000, Richard Henderson wrote: > On 2/27/23 10:12, Michael S. Tsirkin wrote: > > On Mon, Feb 27, 2023 at 11:50:07AM +0000, Daniel P. Berrangé wrote: > > > I feel like we should have separate deprecation entries for the > > > i686 host support, and for qemu-system-i386 emulator binary, as > > > although they're related they are independant features with > > > differing impact. eg removing qemu-system-i386 affects all > > > host architectures, not merely 32-bit x86 host, so I think we > > > can explain the impact more clearly if we separate them. > > > > Removing qemu-system-i386 seems ok to me - I think qemu-system-x86_64 is > > a superset. > > > > Removing support for building on 32 bit systems seems like a pity - it's > > one of a small number of ways to run 64 bit binaries on 32 bit systems, > > and the maintainance overhead is quite small. > > It's not that small. It only works for single-threaded system mode. It > silently does not honor atomicity for user-only mode, which is perhaps worse > not working at all. We should probably block multi-threading on 32 bit then. -- MST