From: Mike Rapoport <rppt@kernel.org>
To: "Kiryl Shutsemau (Meta)" <kas@kernel.org>
Cc: akpm@linux-foundation.org, peterx@redhat.com, david@kernel.org,
ljs@kernel.org, surenb@google.com, vbabka@kernel.org,
Liam.Howlett@oracle.com, ziy@nvidia.com, corbet@lwn.net,
skhan@linuxfoundation.org, seanjc@google.com,
pbonzini@redhat.com, jthoughton@google.com, aarcange@redhat.com,
sj@kernel.org, usama.arif@linux.dev, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kselftest@vger.kernel.org, kvm@vger.kernel.org,
kernel-team@meta.com
Subject: Re: [PATCH 03/14] mm: rename uffd-wp PTE accessors to uffd
Date: Mon, 4 May 2026 09:59:37 +0200 [thread overview]
Message-ID: <afhR6VvypoFQqDzL@kernel.org> (raw)
In-Reply-To: <20260427114607.4068647-4-kas@kernel.org>
On Mon, Apr 27, 2026 at 12:45:51PM +0100, Kiryl Shutsemau (Meta) wrote:
> Userfaultfd RWP will reuse the uffd-wp PTE bit to mark access-tracking
> PTEs, alongside the write-protected ones it already marks. The bit's
> meaning now depends on the VMA flag (WP or RWP), not on its name.
>
> Rename the kernel-internal names that describe the bit:
>
> - pte/pmd/huge_pte accessors (and swap variants)
> - pgtable_supports_uffd() capability query
> - SCAN_PTE_UFFD khugepaged enum
>
> The ftrace string emitted by mm_khugepaged_scan_pmd for this enum is
> kept as "pte_uffd_wp" so existing trace-based tooling keeps matching.
>
> Pure mechanical rename -- no behavior change.
>
> Signed-off-by: Kiryl Shutsemau <kas@kernel.org>
> Assisted-by: Claude:claude-opus-4-6
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
--
Sincerely yours,
Mike.
next prev parent reply other threads:[~2026-05-04 7:59 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-27 11:45 [PATCH 00/14] userfaultfd: working set tracking for VM guest memory Kiryl Shutsemau (Meta)
2026-04-27 11:45 ` [PATCH 01/14] mm: decouple protnone helpers from CONFIG_NUMA_BALANCING Kiryl Shutsemau (Meta)
2026-04-30 4:47 ` SeongJae Park
2026-05-04 7:48 ` Mike Rapoport
2026-04-27 11:45 ` [PATCH 02/14] mm: rename uffd-wp PTE bit macros to uffd Kiryl Shutsemau (Meta)
2026-05-04 7:51 ` Mike Rapoport
2026-04-27 11:45 ` [PATCH 03/14] mm: rename uffd-wp PTE accessors " Kiryl Shutsemau (Meta)
2026-05-04 7:59 ` Mike Rapoport [this message]
2026-04-27 11:45 ` [PATCH 04/14] mm: add VM_UFFD_RWP VMA flag Kiryl Shutsemau (Meta)
2026-04-27 11:45 ` [PATCH 05/14] mm: add MM_CP_UFFD_RWP change_protection() flag Kiryl Shutsemau (Meta)
2026-04-27 11:45 ` [PATCH 06/14] mm: preserve RWP marker across PTE rewrites Kiryl Shutsemau (Meta)
2026-04-27 11:45 ` [PATCH 07/14] mm: handle VM_UFFD_RWP in khugepaged, rmap, and GUP Kiryl Shutsemau (Meta)
2026-04-30 16:28 ` Kiryl Shutsemau
2026-04-30 16:31 ` Kiryl Shutsemau
2026-04-27 11:45 ` [PATCH 08/14] userfaultfd: add UFFDIO_REGISTER_MODE_RWP and UFFDIO_RWPROTECT plumbing Kiryl Shutsemau (Meta)
2026-04-30 16:46 ` Kiryl Shutsemau
2026-04-27 11:45 ` [PATCH 09/14] mm/userfaultfd: add RWP fault delivery and expose UFFDIO_REGISTER_MODE_RWP Kiryl Shutsemau (Meta)
2026-04-30 16:51 ` Kiryl Shutsemau
2026-04-27 11:45 ` [PATCH 10/14] mm/pagemap: add PAGE_IS_ACCESSED for RWP tracking Kiryl Shutsemau (Meta)
2026-05-01 10:41 ` Kiryl Shutsemau
2026-04-27 11:45 ` [PATCH 11/14] userfaultfd: add UFFD_FEATURE_RWP_ASYNC for async fault resolution Kiryl Shutsemau (Meta)
2026-05-01 10:49 ` Kiryl Shutsemau
2026-04-27 11:46 ` [PATCH 12/14] userfaultfd: add UFFDIO_SET_MODE for runtime sync/async toggle Kiryl Shutsemau (Meta)
2026-05-01 13:12 ` Kiryl Shutsemau
2026-04-27 11:46 ` [PATCH 13/14] selftests/mm: add userfaultfd RWP tests Kiryl Shutsemau (Meta)
2026-04-27 11:46 ` [PATCH 14/14] Documentation/userfaultfd: document RWP working set tracking Kiryl Shutsemau (Meta)
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