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Thu, 27 Oct 2022 11:28:20 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7F0E8A4054; Thu, 27 Oct 2022 11:28:19 +0000 (GMT) Received: from [9.179.10.218] (unknown [9.179.10.218]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 27 Oct 2022 11:28:19 +0000 (GMT) Message-ID: Date: Thu, 27 Oct 2022 13:28:19 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.3.1 Subject: Re: [PATCH v10 7/9] s390x/cpu topology: add max_threads machine class attribute Content-Language: en-US To: =?UTF-8?Q?C=c3=a9dric_Le_Goater?= , qemu-s390x@nongnu.org Cc: qemu-devel@nongnu.org, borntraeger@de.ibm.com, pasic@linux.ibm.com, richard.henderson@linaro.org, david@redhat.com, thuth@redhat.com, cohuck@redhat.com, mst@redhat.com, pbonzini@redhat.com, kvm@vger.kernel.org, ehabkost@redhat.com, marcel.apfelbaum@gmail.com, eblake@redhat.com, armbru@redhat.com, seiden@linux.ibm.com, nrb@linux.ibm.com, frankja@linux.ibm.com, berrange@redhat.com References: <20221012162107.91734-1-pmorel@linux.ibm.com> <20221012162107.91734-8-pmorel@linux.ibm.com> <910308da-1cc6-03ea-c8b4-304d90271b8d@kaod.org> From: Pierre Morel In-Reply-To: <910308da-1cc6-03ea-c8b4-304d90271b8d@kaod.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: vyDNanVBz8KRkbBBIP_9CKAbbwxg3x7t X-Proofpoint-ORIG-GUID: IPQJX7RhtQGBEUQdYUJQX7drrh8-Vbrt X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-10-27_05,2022-10-27_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 suspectscore=0 bulkscore=0 adultscore=0 impostorscore=0 spamscore=0 mlxscore=0 clxscore=1015 mlxlogscore=998 phishscore=0 lowpriorityscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2210170000 definitions=main-2210270061 Received-SPF: pass client-ip=148.163.158.5; envelope-from=pmorel@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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: , Sender: "Qemu-devel" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 10/27/22 12:00, Cédric Le Goater wrote: > Hello Pierre, > > On 10/12/22 18:21, Pierre Morel wrote: >> The S390 CPU topology accepts the smp.threads argument while >> in reality it does not effectively allow multthreading. >> >> Let's keep this behavior for machines older than 7.3 and >> refuse to use threads in newer machines until multithreading >> is really proposed to the guest by the machine. > > This change is unrelated to the rest of the series and we could merge it > for 7.2. We still have time for it. OK, then I send it on its own Regards, Pierre ... -- Pierre Morel IBM Lab Boeblingen