[{"id":1775535,"web_url":"http://patchwork.ozlabs.org/comment/1775535/","msgid":"","list_archive_url":null,"date":"2017-09-26T13:51:17","subject":"Re: [Qemu-devel] [PATCH v2 2/2] s390x/ais: disable ais for compat\n\tmachines","submitter":{"id":70402,"url":"http://patchwork.ozlabs.org/api/people/70402/","name":"David Hildenbrand","email":"david@redhat.com"},"content":"On 26.09.2017 15:36, Christian Borntraeger wrote:\n> With newer kernels that do support the ais feature (4.13) a qemu 2.11\n> will not only enable the ais feature for the 2.11 machine, but also\n> for a <=2.10 compat machine. As this feature is not available in\n> QEMU <=2.9 (and QEMU 2.10.1), this guest will fail to migrate\n> back to an older qemu like 2.9 with:\n> \n> _snip_\n> error while loading state for instance 0x0 of device 's390-flic'\n> _snip_\n> \n> making the whole compat machine dis-functional. As a permanent fix, we\n> need to fence the ais feature for machines <= 2.10\n> \n> Due to ais being enabled on 2.10.0 (fixed in 2.10.1) this will prevent\n> migration of ais-enabled guests from 2.10.0 with\n> \n> _snip_\n> qemu-system-s390x: Failed to load s390-flic/ais:tmp\n> qemu-system-s390x: error while loading state for instance 0x0 of device 's390-flic'\n> qemu-system-s390x: load of migration failed: Function not implemented\n> _snip_\n> \n> Signed-off-by: Christian Borntraeger \n> Cc: Yi Min Zhao \n> Cc: Dr. David Alan Gilbert \n> ---\n> hw/intc/s390_flic_kvm.c | 4 +++-\n\n\nAs discussed, I think we should use cpu_model_allowed() instead.","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=nongnu.org\n\t(client-ip=2001:4830:134:3::11; helo=lists.gnu.org;\n\tenvelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n\treceiver=)","ext-mx04.extmail.prod.ext.phx2.redhat.com;\n\tdmarc=none (p=none dis=none) header.from=redhat.com","ext-mx04.extmail.prod.ext.phx2.redhat.com;\n\tspf=fail smtp.mailfrom=david@redhat.com"],"Received":["from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11])\n\t(using TLSv1 with cipher AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3y1j6v1x8sz9tXK\n\tfor ;\n\tTue, 26 Sep 2017 23:51:51 +1000 (AEST)","from localhost ([::1]:47657 helo=lists.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.71) (envelope-from\n\t)\n\tid 1dwqH7-0007bG-Ev\n\tfor incoming@patchwork.ozlabs.org; Tue, 26 Sep 2017 09:51:49 -0400","from eggs.gnu.org ([2001:4830:134:3::10]:53342)\n\tby lists.gnu.org with esmtp (Exim 4.71)\n\t(envelope-from ) id 1dwqGn-0007as-37\n\tfor qemu-devel@nongnu.org; Tue, 26 Sep 2017 09:51:29 -0400","from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)\n\t(envelope-from ) id 1dwqGi-00072h-3x\n\tfor qemu-devel@nongnu.org; Tue, 26 Sep 2017 09:51:29 -0400","from mx1.redhat.com ([209.132.183.28]:43914)\n\tby eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32)\n\t(Exim 4.71) (envelope-from ) id 1dwqGh-00072X-Tk\n\tfor qemu-devel@nongnu.org; Tue, 26 Sep 2017 09:51:24 -0400","from smtp.corp.redhat.com\n\t(int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11])\n\t(using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby mx1.redhat.com (Postfix) with ESMTPS id DAD2D80465;\n\tTue, 26 Sep 2017 13:51:22 +0000 (UTC)","from [10.36.117.152] (ovpn-117-152.ams2.redhat.com [10.36.117.152])\n\tby smtp.corp.redhat.com (Postfix) with ESMTP id 94D57702C1;\n\tTue, 26 Sep 2017 13:51:18 +0000 (UTC)"],"DMARC-Filter":"OpenDMARC Filter v1.3.2 mx1.redhat.com DAD2D80465","To":"Christian Borntraeger ,\n\tCornelia Huck ","References":"<20170926133624.155394-1-borntraeger@de.ibm.com>\n\t<20170926133624.155394-3-borntraeger@de.ibm.com>","From":"David Hildenbrand ","Organization":"Red Hat GmbH","Message-ID":"","Date":"Tue, 26 Sep 2017 15:51:17 +0200","User-Agent":"Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101\n\tThunderbird/52.3.0","MIME-Version":"1.0","In-Reply-To":"<20170926133624.155394-3-borntraeger@de.ibm.com>","Content-Type":"text/plain; charset=utf-8","Content-Language":"en-US","Content-Transfer-Encoding":"7bit","X-Scanned-By":"MIMEDefang 2.79 on 10.5.11.11","X-Greylist":"Sender IP whitelisted, not delayed by milter-greylist-4.5.16\n\t(mx1.redhat.com [10.5.110.28]);\n\tTue, 26 Sep 2017 13:51:23 +0000 (UTC)","X-detected-operating-system":"by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic]\n\t[fuzzy]","X-Received-From":"209.132.183.28","Subject":"Re: [Qemu-devel] [PATCH v2 2/2] s390x/ais: disable ais for compat\n\tmachines","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.21","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"Halil Pasic ,\n\tYi Min Zhao ,\n\tqemu-devel , Alexander Graf ,\n\t\"Jason J . Herne\" ,\n\t\"Dr. David Alan Gilbert\" ,\n\tRichard Henderson ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"\"Qemu-devel\"\n\t"}},{"id":1776075,"web_url":"http://patchwork.ozlabs.org/comment/1776075/","msgid":"<5770bcf6-3608-11e7-7f4e-a91f5046c8c1@de.ibm.com>","list_archive_url":null,"date":"2017-09-27T07:12:03","subject":"Re: [Qemu-devel] [PATCH v2 2/2] s390x/ais: disable ais for compat\n\tmachines","submitter":{"id":590,"url":"http://patchwork.ozlabs.org/api/people/590/","name":"Christian Borntraeger","email":"borntraeger@de.ibm.com"},"content":"On 09/26/2017 03:51 PM, David Hildenbrand wrote:\n> On 26.09.2017 15:36, Christian Borntraeger wrote:\n>> With newer kernels that do support the ais feature (4.13) a qemu 2.11\n>> will not only enable the ais feature for the 2.11 machine, but also\n>> for a <=2.10 compat machine. As this feature is not available in\n>> QEMU <=2.9 (and QEMU 2.10.1), this guest will fail to migrate\n>> back to an older qemu like 2.9 with:\n>>\n>> _snip_\n>> error while loading state for instance 0x0 of device 's390-flic'\n>> _snip_\n>>\n>> making the whole compat machine dis-functional. As a permanent fix, we\n>> need to fence the ais feature for machines <= 2.10\n>>\n>> Due to ais being enabled on 2.10.0 (fixed in 2.10.1) this will prevent\n>> migration of ais-enabled guests from 2.10.0 with\n>>\n>> _snip_\n>> qemu-system-s390x: Failed to load s390-flic/ais:tmp\n>> qemu-system-s390x: error while loading state for instance 0x0 of device 's390-flic'\n>> qemu-system-s390x: load of migration failed: Function not implemented\n>> _snip_\n>>\n>> Signed-off-by: Christian Borntraeger \n>> Cc: Yi Min Zhao \n>> Cc: Dr. David Alan Gilbert \n>> ---\n>> hw/intc/s390_flic_kvm.c | 4 +++-\n> \n> \n> As discussed, I think we should use cpu_model_allowed() instead.\nI think I still prefer the explicit check for ais-enabled to make managedsave\n(on the same system) continue to work if the user does not specify a cpu model \nat all (which will then fallback to the host model). We already fence other\nthings (like guarded storage) and yes it will grow over time but the \n*_allowed things seem to be the smallest maintenance issue in this area.","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":"ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=nongnu.org\n\t(client-ip=2001:4830:134:3::11; helo=lists.gnu.org;\n\tenvelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n\treceiver=)","Received":["from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11])\n\t(using TLSv1 with cipher AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3y28Df25BNz9t4Z\n\tfor ;\n\tWed, 27 Sep 2017 17:13:09 +1000 (AEST)","from localhost ([::1]:52550 helo=lists.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.71) (envelope-from\n\t)\n\tid 1dx6Wm-0007Pr-Ma\n\tfor incoming@patchwork.ozlabs.org; Wed, 27 Sep 2017 03:13:04 -0400","from eggs.gnu.org ([2001:4830:134:3::10]:42393)\n\tby lists.gnu.org with esmtp (Exim 4.71)\n\t(envelope-from ) id 1dx6WS-0007Pj-3M\n\tfor qemu-devel@nongnu.org; Wed, 27 Sep 2017 03:12:44 -0400","from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)\n\t(envelope-from ) id 1dx6WO-00043i-SK\n\tfor qemu-devel@nongnu.org; Wed, 27 Sep 2017 03:12:44 -0400","from mx0a-001b2d01.pphosted.com ([148.163.156.1]:41246)\n\tby eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32)\n\t(Exim 4.71) (envelope-from )\n\tid 1dx6WM-00040b-FD\n\tfor qemu-devel@nongnu.org; Wed, 27 Sep 2017 03:12:40 -0400","from pps.filterd (m0098410.ppops.net [127.0.0.1])\n\tby mx0a-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id\n\tv8R7BMpl116326\n\tfor ; Wed, 27 Sep 2017 03:12:09 -0400","from e06smtp13.uk.ibm.com (e06smtp13.uk.ibm.com [195.75.94.109])\n\tby mx0a-001b2d01.pphosted.com with ESMTP id 2d806h2x3b-1\n\t(version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT)\n\tfor ; Wed, 27 Sep 2017 03:12:09 -0400","from localhost\n\tby e06smtp13.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use\n\tOnly! Violators will be prosecuted\n\tfor from ;\n\tWed, 27 Sep 2017 08:12:06 +0100","from b06cxnps3075.portsmouth.uk.ibm.com (9.149.109.195)\n\tby e06smtp13.uk.ibm.com (192.168.101.143) with IBM ESMTP SMTP\n\tGateway: Authorized Use Only! Violators will be prosecuted; \n\tWed, 27 Sep 2017 08:12:04 +0100","from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com\n\t[9.149.105.62])\n\tby b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with\n\tESMTP id v8R7C3Lv27787328; Wed, 27 Sep 2017 07:12:03 GMT","from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1])\n\tby IMSVA (Postfix) with ESMTP id 4C703AE051;\n\tWed, 27 Sep 2017 08:06:45 +0100 (BST)","from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1])\n\tby IMSVA (Postfix) with ESMTP id 03776AE045;\n\tWed, 27 Sep 2017 08:06:45 +0100 (BST)","from oc7330422307.ibm.com (unknown [9.152.224.56])\n\tby d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP;\n\tWed, 27 Sep 2017 08:06:44 +0100 (BST)"],"To":"David Hildenbrand , Cornelia Huck ","References":"<20170926133624.155394-1-borntraeger@de.ibm.com>\n\t<20170926133624.155394-3-borntraeger@de.ibm.com>\n\t","From":"Christian Borntraeger ","Date":"Wed, 27 Sep 2017 09:12:03 +0200","User-Agent":"Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101\n\tThunderbird/52.2.0","MIME-Version":"1.0","In-Reply-To":"","Content-Type":"text/plain; charset=utf-8","Content-Language":"en-US","Content-Transfer-Encoding":"7bit","X-TM-AS-GCONF":"00","x-cbid":"17092707-0012-0000-0000-0000057C7DF2","X-IBM-AV-DETECTION":"SAVI=unused REMOTE=unused XFE=unused","x-cbparentid":"17092707-0013-0000-0000-000018F5CD6D","Message-Id":"<5770bcf6-3608-11e7-7f4e-a91f5046c8c1@de.ibm.com>","X-Proofpoint-Virus-Version":"vendor=fsecure engine=2.50.10432:, ,\n\tdefinitions=2017-09-27_02:, , signatures=0","X-Proofpoint-Spam-Details":"rule=outbound_notspam policy=outbound score=0\n\tspamscore=0 suspectscore=0\n\tmalwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam\n\tadjust=0 reason=mlx scancount=1 engine=8.0.1-1707230000\n\tdefinitions=main-1709270106","X-detected-operating-system":"by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy]","X-Received-From":"148.163.156.1","Subject":"Re: [Qemu-devel] [PATCH v2 2/2] s390x/ais: disable ais for compat\n\tmachines","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.21","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"Halil Pasic ,\n\tYi Min Zhao ,\n\tqemu-devel , Alexander Graf ,\n\t\"Jason J . Herne\" ,\n\t\"Dr. David Alan Gilbert\" ,\n\tRichard Henderson ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"\"Qemu-devel\"\n\t"}},{"id":1776106,"web_url":"http://patchwork.ozlabs.org/comment/1776106/","msgid":"<2f3eb94e-c07f-8752-059c-de5900859fff@de.ibm.com>","list_archive_url":null,"date":"2017-09-27T08:03:31","subject":"Re: [Qemu-devel] [PATCH v2 2/2] s390x/ais: disable ais for compat\n\tmachines","submitter":{"id":590,"url":"http://patchwork.ozlabs.org/api/people/590/","name":"Christian Borntraeger","email":"borntraeger@de.ibm.com"},"content":"On 09/27/2017 09:12 AM, Christian Borntraeger wrote:\n> \n> \n> On 09/26/2017 03:51 PM, David Hildenbrand wrote:\n>> On 26.09.2017 15:36, Christian Borntraeger wrote:\n>>> With newer kernels that do support the ais feature (4.13) a qemu 2.11\n>>> will not only enable the ais feature for the 2.11 machine, but also\n>>> for a <=2.10 compat machine. As this feature is not available in\n>>> QEMU <=2.9 (and QEMU 2.10.1), this guest will fail to migrate\n>>> back to an older qemu like 2.9 with:\n>>>\n>>> _snip_\n>>> error while loading state for instance 0x0 of device 's390-flic'\n>>> _snip_\n>>>\n>>> making the whole compat machine dis-functional. As a permanent fix, we\n>>> need to fence the ais feature for machines <= 2.10\n>>>\n>>> Due to ais being enabled on 2.10.0 (fixed in 2.10.1) this will prevent\n>>> migration of ais-enabled guests from 2.10.0 with\n>>>\n>>> _snip_\n>>> qemu-system-s390x: Failed to load s390-flic/ais:tmp\n>>> qemu-system-s390x: error while loading state for instance 0x0 of device 's390-flic'\n>>> qemu-system-s390x: load of migration failed: Function not implemented\n>>> _snip_\n>>>\n>>> Signed-off-by: Christian Borntraeger \n>>> Cc: Yi Min Zhao \n>>> Cc: Dr. David Alan Gilbert \n>>> ---\n>>> hw/intc/s390_flic_kvm.c | 4 +++-\n>>\n>>\n>> As discussed, I think we should use cpu_model_allowed() instead.\n> I think I still prefer the explicit check for ais-enabled to make managedsave\n> (on the same system) continue to work if the user does not specify a cpu model \n> at all (which will then fallback to the host model). We already fence other\n> things (like guarded storage) and yes it will grow over time but the \n> *_allowed things seem to be the smallest maintenance issue in this area.\n\nHmm, on the other hand this fails only when we migrate to an older qemu during\nmanagedsave. So yes, maybe this is just an \"will not work anyway\"","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":"ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=nongnu.org\n\t(client-ip=2001:4830:134:3::11; helo=lists.gnu.org;\n\tenvelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n\treceiver=)","Received":["from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11])\n\t(using TLSv1 with cipher AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3y29Mm383Cz9sBd\n\tfor ;\n\tWed, 27 Sep 2017 18:04:36 +1000 (AEST)","from localhost ([::1]:53136 helo=lists.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.71) (envelope-from\n\t)\n\tid 1dx7Kc-0001TK-Gm\n\tfor incoming@patchwork.ozlabs.org; Wed, 27 Sep 2017 04:04:34 -0400","from eggs.gnu.org ([2001:4830:134:3::10]:34899)\n\tby lists.gnu.org with esmtp (Exim 4.71)\n\t(envelope-from ) id 1dx7Jt-0001Og-1w\n\tfor qemu-devel@nongnu.org; Wed, 27 Sep 2017 04:03:54 -0400","from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)\n\t(envelope-from ) id 1dx7Jn-0004uB-1t\n\tfor qemu-devel@nongnu.org; Wed, 27 Sep 2017 04:03:49 -0400","from mx0a-001b2d01.pphosted.com ([148.163.156.1]:54898)\n\tby eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32)\n\t(Exim 4.71) (envelope-from )\n\tid 1dx7Jm-0004tr-OO\n\tfor qemu-devel@nongnu.org; Wed, 27 Sep 2017 04:03:42 -0400","from pps.filterd (m0098410.ppops.net [127.0.0.1])\n\tby mx0a-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id\n\tv8R82hn3111965\n\tfor ; Wed, 27 Sep 2017 04:03:39 -0400","from e06smtp12.uk.ibm.com (e06smtp12.uk.ibm.com [195.75.94.108])\n\tby mx0a-001b2d01.pphosted.com with ESMTP id 2d87p11r6j-1\n\t(version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT)\n\tfor ; Wed, 27 Sep 2017 04:03:38 -0400","from localhost\n\tby e06smtp12.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use\n\tOnly! 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Violators will be prosecuted; \n\tWed, 27 Sep 2017 09:03:32 +0100","from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com\n\t[9.149.105.58])\n\tby b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with\n\tESMTP id v8R83VVY18743496; Wed, 27 Sep 2017 08:03:31 GMT","from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1])\n\tby IMSVA (Postfix) with ESMTP id 1572D4C044;\n\tWed, 27 Sep 2017 08:59:47 +0100 (BST)","from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1])\n\tby IMSVA (Postfix) with ESMTP id C22054C040;\n\tWed, 27 Sep 2017 08:59:46 +0100 (BST)","from oc7330422307.ibm.com (unknown [9.152.99.52])\n\tby d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP;\n\tWed, 27 Sep 2017 08:59:46 +0100 (BST)"],"From":"Christian Borntraeger ","To":"David Hildenbrand , Cornelia Huck ","References":"<20170926133624.155394-1-borntraeger@de.ibm.com>\n\t<20170926133624.155394-3-borntraeger@de.ibm.com>\n\t\n\t<5770bcf6-3608-11e7-7f4e-a91f5046c8c1@de.ibm.com>","Date":"Wed, 27 Sep 2017 10:03:31 +0200","User-Agent":"Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101\n\tThunderbird/52.2.0","MIME-Version":"1.0","In-Reply-To":"<5770bcf6-3608-11e7-7f4e-a91f5046c8c1@de.ibm.com>","Content-Type":"text/plain; charset=utf-8","Content-Language":"en-US","Content-Transfer-Encoding":"7bit","X-TM-AS-GCONF":"00","x-cbid":"17092708-0008-0000-0000-0000049A7980","X-IBM-AV-DETECTION":"SAVI=unused REMOTE=unused XFE=unused","x-cbparentid":"17092708-0009-0000-0000-00001E2BC6A4","Message-Id":"<2f3eb94e-c07f-8752-059c-de5900859fff@de.ibm.com>","X-Proofpoint-Virus-Version":"vendor=fsecure engine=2.50.10432:, ,\n\tdefinitions=2017-09-27_02:, , signatures=0","X-Proofpoint-Spam-Details":"rule=outbound_notspam policy=outbound score=0\n\tspamscore=0 suspectscore=0\n\tmalwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam\n\tadjust=0 reason=mlx scancount=1 engine=8.0.1-1707230000\n\tdefinitions=main-1709270109","X-detected-operating-system":"by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy]","X-Received-From":"148.163.156.1","Subject":"Re: [Qemu-devel] [PATCH v2 2/2] s390x/ais: disable ais for compat\n\tmachines","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.21","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"Halil Pasic ,\n\tYi Min Zhao ,\n\tqemu-devel , Alexander Graf ,\n\t\"Jason J . 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