From: Christian Borntraeger <borntraeger@linux.ibm.com>
To: Balbir Singh <balbirs@nvidia.com>,
David Hildenbrand <david@redhat.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>
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
Subject: Re: linux-next: KVM/s390x regression
Date: Mon, 20 Oct 2025 09:00:11 +0200 [thread overview]
Message-ID: <f5debf87-0477-4d6a-8280-0cd95cd09412@linux.ibm.com> (raw)
In-Reply-To: <c9f28d0c-6b06-47a2-884d-7533f7b49c45@nvidia.com>
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.
next prev parent reply other threads:[~2025-10-20 7:01 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20251001065707.920170-4-balbirs@nvidia.com>
2025-10-17 14:49 ` linux-next: KVM/s390x regression (was: [v7 03/16] mm/huge_memory: add device-private THP support to PMD operations) Christian Borntraeger
2025-10-17 14:54 ` linux-next: KVM/s390x regression David Hildenbrand
2025-10-17 15:01 ` Christian Borntraeger
2025-10-17 15:07 ` David Hildenbrand
2025-10-17 15:20 ` Christian Borntraeger
2025-10-17 17:07 ` David Hildenbrand
2025-10-17 21:56 ` Balbir Singh
2025-10-17 22:15 ` David Hildenbrand
2025-10-17 22:41 ` David Hildenbrand
2025-10-20 7:01 ` Christian Borntraeger
2025-10-20 7:00 ` Christian Borntraeger [this message]
2025-10-20 8:41 ` David Hildenbrand
2025-10-20 9:04 ` Claudio Imbrenda
2025-10-27 16:47 ` Claudio Imbrenda
2025-10-27 16:59 ` David Hildenbrand
2025-10-27 17:06 ` Christian Borntraeger
2025-10-28 9:24 ` Balbir Singh
2025-10-28 13:01 ` [PATCH v1 0/1] KVM: s390: Fix missing present bit for gmap puds Claudio Imbrenda
2025-10-28 13:01 ` [PATCH v1 1/1] " Claudio Imbrenda
2025-10-28 21:23 ` Balbir Singh
2025-10-29 10:00 ` David Hildenbrand
2025-10-29 10:20 ` Claudio Imbrenda
2025-10-28 22:53 ` [PATCH v1 0/1] " Andrew Morton
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