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Mon, 20 Sep 2021 15:30:12 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9CECF4C059; Mon, 20 Sep 2021 15:30:11 +0000 (GMT) Received: from li-43c5434c-23b8-11b2-a85c-c4958fb47a68.ibm.com (unknown [9.171.21.246]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 20 Sep 2021 15:30:11 +0000 (GMT) Subject: Re: [PATCH 0/1] KVM: s390: backport for stable of "KVM: s390: index To: Greg KH Cc: stable@vger.kernel.org, Paolo Bonzini , KVM , Cornelia Huck , Janosch Frank , David Hildenbrand , linux-s390 , Thomas Huth , Claudio Imbrenda , =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= , Nitesh Narayan Lal , Halil Pasic References: <20210920150616.15668-1-borntraeger@de.ibm.com> From: Christian Borntraeger Message-ID: <16dad0d8-43bf-1ad7-bf3e-ae3acfde97eb@de.ibm.com> Date: Mon, 20 Sep 2021 17:30:11 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: Y8UCpFASt39i18TwPb2kmabvEAOPjHb8 X-Proofpoint-ORIG-GUID: C8iVt7EszD-JHo1ucCGgFxdLdxQtanEP X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.182.1,Aquarius:18.0.790,Hydra:6.0.391,FMLib:17.0.607.475 definitions=2021-09-20_07,2021-09-20_01,2020-04-07_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 priorityscore=1501 mlxscore=0 mlxlogscore=956 impostorscore=0 suspectscore=0 phishscore=0 clxscore=1015 spamscore=0 lowpriorityscore=0 bulkscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2109030001 definitions=main-2109200097 Precedence: bulk List-ID: X-Mailing-List: linux-s390@vger.kernel.org Am 20.09.21 um 17:24 schrieb Greg KH: > On Mon, Sep 20, 2021 at 05:06:15PM +0200, Christian Borntraeger wrote: >> Stable team, >> >> here is a backport for 4.19 of >> commit a3e03bc1368 ("KVM: s390: index kvm->arch.idle_mask by vcpu_idx") >> This basically removes the kick_mask parts that were introduced with >> kernel 5.0 and fixes up the location of the idle_mask to the older >> place. > > Now queued up, thanks. > >> FWIW, it might be a good idea to also backport >> 8750e72a79dd ("KVM: remember position in kvm->vcpus array") to avoid >> a performance regression for large guests (many vCPUs) when this patch >> is applied. >> @Paolo Bonzini, would you be ok with 8750e72a79dd in older stable releases? > > That would also have to go into 5.4.y, right? Ideally yes.