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Mon, 24 Nov 2025 17:35:54 +0000 (GMT) Message-ID: Date: Mon, 24 Nov 2025 18:35:53 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 22/23] KVM: s390: Enable 1M pages for gmap To: Claudio Imbrenda , kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, frankja@linux.ibm.com, nsg@linux.ibm.com, nrb@linux.ibm.com, seiden@linux.ibm.com, gra@linux.ibm.com, schlameuss@linux.ibm.com, hca@linux.ibm.com, svens@linux.ibm.com, agordeev@linux.ibm.com, gor@linux.ibm.com, david@redhat.com, gerald.schaefer@linux.ibm.com References: <20251124115554.27049-1-imbrenda@linux.ibm.com> <20251124115554.27049-23-imbrenda@linux.ibm.com> Content-Language: en-US From: Christian Borntraeger In-Reply-To: <20251124115554.27049-23-imbrenda@linux.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTIyMDAyMSBTYWx0ZWRfXza/731TfrDiI 5L40wnscnsSQOnWAMD8TeMGMdSo3t01ICDX+AtFBbpAK+FR15GD8S+OWfSeue0QeJ16el2FWfUL hjDA+rCcm7xurav2ZVFpfwJ6g2wNcACEOuKfp85Csc8dOxkiNoWYfJ1K4XVBfwN+T+y+8Get4FK B27T9p4NWm8/IwEvZ5bo/tmM7WjZMLUsR0lfRmB3ZxwTFn9+OFMQy6z/lh9QomgY/WtyCAGtt77 uq1haiPXDPj81YJfzH1rn7jNW6xXjtqPaHz5YMxXu/V32IGZZc/9JOAl/2SzkTBhhg4JCQ0BHoq YCQu7rpqANk+xN2LuBXb5gl9IHcUXE5BJ3j69izCLUAn+6QPjaRtpiH+/M+vChAWGrrlJHbQOxt 2ZbxJDU459qwcZnTRNlePKrsXN/zLA== X-Proofpoint-ORIG-GUID: jnma2gun4kttsFkuBsXLiryh0XB5LEOz X-Proofpoint-GUID: jnma2gun4kttsFkuBsXLiryh0XB5LEOz X-Authority-Analysis: v=2.4 cv=TMJIilla c=1 sm=1 tr=0 ts=69249781 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=QnHJmA3E2XFGw8ITv2AA:9 a=QEXdDO2ut3YA:10 a=yzbO-VOS5BcA:10 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-24_06,2025-11-24_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 spamscore=0 phishscore=0 impostorscore=0 clxscore=1015 adultscore=0 bulkscore=0 suspectscore=0 malwarescore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2510240000 definitions=main-2511220021 Am 24.11.25 um 12:55 schrieb Claudio Imbrenda: [...] > @@ -5837,11 +5838,6 @@ static int __init kvm_s390_init(void) > return -ENODEV; > } > > - if (nested && hpage) { > - pr_info("A KVM host that supports nesting cannot back its KVM guests with huge pages\n"); > - return -EINVAL; > - } > - Yay. As a followup (when things have settled) we should set either set the default of hpage to 1 or even remove the hpage kernel parameter alltogether.