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Mon, 20 Oct 2025 07:00:13 GMT Received: from smtpav03.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D092220063; Mon, 20 Oct 2025 07:00:12 +0000 (GMT) Received: from smtpav03.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3788420040; Mon, 20 Oct 2025 07:00:12 +0000 (GMT) Received: from [9.155.199.94] (unknown [9.155.199.94]) by smtpav03.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 20 Oct 2025 07:00:12 +0000 (GMT) Message-ID: Date: Mon, 20 Oct 2025 09:00:11 +0200 Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: linux-next: KVM/s390x regression To: Balbir Singh , David Hildenbrand , Claudio Imbrenda Cc: Liam.Howlett@oracle.com, airlied@gmail.com, akpm@linux-foundation.org, apopple@nvidia.com, baohua@kernel.org, baolin.wang@linux.alibaba.com, byungchul@sk.com, dakr@kernel.org, dev.jain@arm.com, dri-devel@lists.freedesktop.org, francois.dugast@intel.com, gourry@gourry.net, joshua.hahnjy@gmail.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, lyude@redhat.com, matthew.brost@intel.com, mpenttil@redhat.com, npache@redhat.com, osalvador@suse.de, rakie.kim@sk.com, rcampbell@nvidia.com, ryan.roberts@arm.com, simona@ffwll.ch, ying.huang@linux.alibaba.com, ziy@nvidia.com, kvm@vger.kernel.org, linux-s390@vger.kernel.org, linux-next@vger.kernel.org References: <20251001065707.920170-4-balbirs@nvidia.com> <20251017144924.10034-1-borntraeger@linux.ibm.com> <9beff9d6-47c7-4a65-b320-43efd1e12687@redhat.com> <8c778cd0-5608-4852-9840-4d98828d7b33@redhat.com> <74272098-cfb7-424b-a55e-55e94f04524e@linux.ibm.com> <84349344-b127-41f6-99f1-10f907c2bd07@redhat.com> Content-Language: en-US From: Christian Borntraeger In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=EJELElZC c=1 sm=1 tr=0 ts=68f5de01 cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=IkcTkHD0fZMA:10 a=x6icFKpwvdMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=hRXosVVZac08vXWCpJUA:9 a=QEXdDO2ut3YA:10 a=nl4s5V0KI7Kw-pW0DWrs:22 a=pHzHmUro8NiASowvMSCR:22 a=xoEH_sTeL_Rfw54TyV31:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMDE4MDAyMiBTYWx0ZWRfX98Cmyy2VIX+n dsuJUM5W4yhdubfkIxrTGiDf3eUSX6qAHVGDCj4nsCIHsAetsqanqBhooG+QFvAek1wt9EbD1Mq z805J4i24oMF+G5xVJyvQYVP7rgbzKYUNL5FX+QNIl0/Oyh2GIL9amX//9CWItIQhhckuUkLxnn CbizP2+lTQhHGC1J4/gyBrY0Ha9TEnnr+fxAzMRWtz8b+gooEk/TZcj2ulUgCoFx7f4r2v/Ds7y 3gMXqFGf4EjVRFamhAh4KhXHJKQXyTYOlpt8qBSLCFLQ0GXQgrOoGFltEODuj8dyauywZ8nxXGK A99WW2zj5N0tq1biHrypl+CxqoDXW20gJ014TK25xW2sEKYeXAgfme8Kd/xZ0ETPmxmB/2zOpVC IOMn9QEe/oXzoaLvTkWh5E9MXnriHA== X-Proofpoint-GUID: 21HjIMs8bZEwgOEHgip1sCXZekDNKoJ7 X-Proofpoint-ORIG-GUID: azkXi4-8U0MxbTXNtBgIwP4eYW3FjhRt X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-10-20_02,2025-10-13_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 priorityscore=1501 suspectscore=0 bulkscore=0 spamscore=0 malwarescore=0 phishscore=0 adultscore=0 lowpriorityscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2510020000 definitions=main-2510180022 Am 17.10.25 um 23:56 schrieb Balbir Singh: > In the meanwhile, does this fix/workaround work? > > diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c > index 0c847cdf4fd3..31c1754d5bd4 100644 > --- a/mm/pgtable-generic.c > +++ b/mm/pgtable-generic.c > @@ -290,7 +290,7 @@ pte_t *___pte_offset_map(pmd_t *pmd, unsigned long addr, pmd_t *pmdvalp) > > if (pmdvalp) > *pmdvalp = pmdval; > - if (unlikely(pmd_none(pmdval) || !pmd_present(pmdval))) > + if (unlikely(pmd_none(pmdval) || is_pmd_non_present_folio_entry(pmdval))) > goto nomap; > if (unlikely(pmd_trans_huge(pmdval))) > goto nomap; > Yes, this seems to work. CC Claudio.