From: David Hildenbrand <david@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org, nvdimm@lists.linux.dev,
linux-cxl@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Alistair Popple <apopple@nvidia.com>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
Vlastimil Babka <vbabka@suse.cz>, Mike Rapoport <rppt@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>, Zi Yan <ziy@nvidia.com>,
Baolin Wang <baolin.wang@linux.alibaba.com>,
Nico Pache <npache@redhat.com>,
Ryan Roberts <ryan.roberts@arm.com>, Dev Jain <dev.jain@arm.com>,
Dan Williams <dan.j.williams@intel.com>
Subject: Re: [PATCH v1 0/2] mm/huge_memory: don't mark refcounted pages special in vmf_insert_folio_*()
Date: Tue, 3 Jun 2025 23:36:28 +0200 [thread overview]
Message-ID: <b80b62dc-76b9-4b3b-b980-7fa3584c9762@redhat.com> (raw)
In-Reply-To: <20250603211634.2925015-1-david@redhat.com>
On 03.06.25 23:16, David Hildenbrand wrote:
> Based on Linus' master.
>
> While working on improving vm_normal_page() and friends, I stumbled
> over this issues: refcounted "normal" pages must not be marked
> using pmd_special() / pud_special().
>
> Fortunately, so far there doesn't seem to be serious damage.
>
> This is only compile-tested so far. Still looking for an easy way to test
> PMD/PUD mappings with DAX. Any tests I can easily run?
... aaaand I should have waited for the cross compiles.
s390x and loongarch are not happy about pud_mkhuge() and pfn_pud().
Need to fence folio_mk_pud() by CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD.
--
Cheers,
David / dhildenb
next prev parent reply other threads:[~2025-06-03 21:36 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-03 21:16 David Hildenbrand
2025-06-03 21:16 ` [PATCH v1 1/2] mm/huge_memory: don't mark refcounted pages special in vmf_insert_folio_pmd() David Hildenbrand
2025-06-06 8:20 ` Oscar Salvador
2025-06-06 8:23 ` David Hildenbrand
2025-06-06 8:26 ` Oscar Salvador
2025-06-06 8:52 ` David Hildenbrand
2025-06-06 18:41 ` David Hildenbrand
2025-06-06 8:27 ` Oscar Salvador
2025-06-03 21:16 ` [PATCH v1 2/2] mm/huge_memory: don't mark refcounted pages special in vmf_insert_folio_pud() David Hildenbrand
2025-06-03 22:02 ` David Hildenbrand
2025-06-06 8:27 ` Oscar Salvador
2025-06-03 21:36 ` David Hildenbrand [this message]
2025-06-05 23:47 ` [PATCH v1 0/2] mm/huge_memory: don't mark refcounted pages special in vmf_insert_folio_*() Dan Williams
2025-06-06 7:28 ` David Hildenbrand
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