From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by 2002:a17:906:c1cf:b0:a52:4db9:938b with SMTP id bw15csp2816155ejb; Tue, 30 Apr 2024 02:45:49 -0700 (PDT) X-Forwarded-Encrypted: i=2; AJvYcCWyj95ccZD5eJlbXiO3oMajN52GAImqX/7EZexFL2WjXf+bopxJF5i2dY2qi6h+XVpNFJ9pTnE5zKGNLHK9h8bV9uLrbSZQ X-Google-Smtp-Source: AGHT+IHU8vnYhqbWynGi1PUXWoHoA4SAa/7Lad+i05o6OoU6V4Ot66QTmejtcSbIKZOl9cKvuVeT X-Received: by 2002:ac8:5807:0:b0:43a:c9de:3509 with SMTP id g7-20020ac85807000000b0043ac9de3509mr8632900qtg.60.1714470348968; Tue, 30 Apr 2024 02:45:48 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1714470348; cv=none; d=google.com; s=arc-20160816; b=lDFftZ/NNjDr5rW99OGO3qlsYF5AjVmyE2/npkroJf5/vLXzpuX65brJx6z4lAc2hg CXIGxsul9ou5UcAkHqwt1N7wQbi40OE/9WslKVNzL42SKDHEfSMh3dFN82s4AlmL5opT +rArCDkqbIGE72wAlHN+1DqQQPqIS3TNf7FXBBy4Sxhn6NiOMn8rEPBlJaSYCo/BedVy 9V8IpU5hK8a/O8KYRxHrBleMBSaZGl58v/LU+CKflNzdi4G2Dvn8QQUuXfxjBzdIfNXV 0tanFe6tCLd3KrtbbHLbSUrxGajH1Kv46Px2LY4QGjzIExTDm7LLsE2IPAJo1yXwjGak /p1g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=user-agent:in-reply-to:content-disposition:mime-version:references :reply-to:message-id:subject:cc:to:from:date:dkim-signature; bh=pfCsWb/zmNYlBQiIioOGwzePlc1xWrUHDqv72TBkkAM=; fh=kZPypYlo8KnTPo+YK6MuaW3fuUhwrYMOQYaAiRshy4I=; b=psdEeafyiw8HpTesQA+gc5w2lNaQiT5bSaMghe2tIQlno88UMArqrv6sFnexxqVPwa 03Heal4Gkb3cvAQJR4qNupGGU7QGgz0GQvrSnKnQHd0Kt/yLZ6rodpVUhsCbyuKIDmMg s4LOptVKCva0Ocz6h6Qf9kiXtAwyF0HAy/zzeKP64O1iwXo7sTZ9rIbkvWIllJRCZ2xX iupqNa7BKLfhvDw8peEolRj/iqrsxu6qQ7yDJQ3cL2v1J6i4jC/aprLkKQhwP/yj9Ph+ yGCp9l+CUtrZ/YBs2sFMudxznpnAdtnS5pEoagq0h4Fu2moTtfVEldaOB2NHBrzFK0zm 5d9Q==; dara=google.com ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=SDpoYR2J; spf=pass (google.com: domain of berrange@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=berrange@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. [170.10.129.124]) by mx.google.com with ESMTPS id eh25-20020a05622a579900b00431819d4ebfsi19963059qtb.521.2024.04.30.02.45.48 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 Apr 2024 02:45:48 -0700 (PDT) Received-SPF: pass (google.com: domain of berrange@redhat.com designates 170.10.129.124 as permitted sender) client-ip=170.10.129.124; Authentication-Results: mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=SDpoYR2J; spf=pass (google.com: domain of berrange@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=berrange@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=1714470348; 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:in-reply-to:in-reply-to: references:references; bh=pfCsWb/zmNYlBQiIioOGwzePlc1xWrUHDqv72TBkkAM=; b=SDpoYR2JIq0G5gQVdBDv0bB9GXm4624dAcjPo4aLJ404wd2Ja2rkI1NrGw55c65VnEuRPT mkvB+GiIkK5Qy/LYqB3Wff+eTehvX1wZZA2XwJua7M36zIkneEqR96npGxFlzvTpiP5WfC Eka50GVfm3WBK6hNfj8I15jY4kOf5MU= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-19-si34PYgmOFKsNlGUNRmtKw-1; Tue, 30 Apr 2024 05:45:45 -0400 X-MC-Unique: si34PYgmOFKsNlGUNRmtKw-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (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 mimecast-mx02.redhat.com (Postfix) with ESMTPS id 811E41C29EA0; Tue, 30 Apr 2024 09:45:43 +0000 (UTC) Received: from redhat.com (unknown [10.42.28.59]) by smtp.corp.redhat.com (Postfix) with ESMTPS id B0FC31C060D0; Tue, 30 Apr 2024 09:45:41 +0000 (UTC) Date: Tue, 30 Apr 2024 10:45:39 +0100 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Thomas Huth Cc: qemu-devel@nongnu.org, Peter Maydell , devel@lists.libvirt.org, Alex =?utf-8?Q?Benn=C3=A9e?= , Laurent Vivier , qemu-s390x@nongnu.org, qemu-arm@nongnu.org, qemu-ppc@nongnu.org, Peter Xu , Fabiano Rosas Subject: Re: [PATCH] docs/about: Automatically deprecate versioned machine types older than 6 years Message-ID: Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= References: <20240430064529.411699-1-thuth@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20240430064529.411699-1-thuth@redhat.com> User-Agent: Mutt/2.2.12 (2023-09-09) X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.7 X-TUID: uETO77T1RW2s On Tue, Apr 30, 2024 at 08:45:29AM +0200, Thomas Huth wrote: > Old machine types often have bugs or work-arounds that affect our > possibilities to move forward with the QEMU code base (see for example > https://gitlab.com/qemu-project/qemu/-/issues/2213 for a bug that likely > cannot be fixed without breaking live migration with old machine types, > or https://lists.gnu.org/archive/html/qemu-devel/2018-12/msg04516.html or > commit ea985d235b86). So instead of going through the process of manually > deprecating old machine types again and again, let's rather add an entry > that can stay, which declares that machine types older than 6 years are > considered as deprecated automatically. Six years should be sufficient to > support the release cycles of most Linux distributions. If anyone thinks 6 years is not very long, consider that this implies QEMU will be maintaining *18* versions for each versioned machine type. So across aarch64 'virt', x86 'pc' & 'q35', ppc 'spapr', s390x 'ccw', and m68k 'virt', that's upto 108 machines we're keeping ABI preserved for in the worst case... > > Signed-off-by: Thomas Huth > --- > docs/about/deprecated.rst | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst > index 6d595de3b6..fe69e2d44c 100644 > --- a/docs/about/deprecated.rst > +++ b/docs/about/deprecated.rst > @@ -220,6 +220,17 @@ is a chance the code will bitrot without anyone noticing. > System emulator machines > ------------------------ > > +Versioned machine types older than 6 years > +'''''''''''''''''''''''''''''''''''''''''' > + > +Starting with the release of QEMU 10.0, versioned machine types older than > +6 years will automatically be considered as deprecated and might be due to How about: s/6 years/6 years (equivalent to 18 releases)/ Also s/as deprecated/deprecated/ s/due to/liable for/ > +removal without furthor notice. For example, this affects machine types like > +pc-i440fx-X.Y, pc-q35-X.Y, pseries-X.Y, s390-ccw-virtio-X.Y or virt-X.Y where > +X is the major number and Y is the minor number of the old QEMU version. > +If you are still using machine types from QEMU versions older than 6 years, Again s/6 years/6 years (equivalent to 18 releases)/ > +please update your setting to use a newer versioned machine type instead. s/setting/configuration/ > + > Arm ``virt`` machine ``dtb-kaslr-seed`` property (since 7.1) > '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' 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 :|