From: SeongJae Park <sj@kernel.org>
To: "Kiryl Shutsemau (Meta)" <kas@kernel.org>
Cc: SeongJae Park <sj@kernel.org>,
akpm@linux-foundation.org, rppt@kernel.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,
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 v2 02/14] mm: rename uffd-wp PTE bit macros to uffd
Date: Fri, 8 May 2026 16:52:05 -0700 [thread overview]
Message-ID: <20260508235206.83633-1-sj@kernel.org> (raw)
In-Reply-To: <4ff3508b951ec4879177dd079003c3fa3af0a444.1778254670.git.kas@kernel.org>
On Fri, 8 May 2026 16:55:14 +0100 "Kiryl Shutsemau (Meta)" <kas@kernel.org> wrote:
> The uffd-wp PTE bit is about to gain a second consumer: userfaultfd
> RWP will use the same bit to mark access-tracking PTEs, distinct
> from mprotect(PROT_NONE) or NUMA-hinting PTEs. WP vs RWP semantics
> come from the VMA flag; the bit is just "uffd has claimed this
> entry." Drop the "_wp" suffix from the arch-private bit macros so
> they reflect that.
>
> x86: _PAGE_BIT_UFFD_WP -> _PAGE_BIT_UFFD
> _PAGE_UFFD_WP -> _PAGE_UFFD
> _PAGE_SWP_UFFD_WP -> _PAGE_SWP_UFFD
> arm64: PTE_UFFD_WP -> PTE_UFFD
> PTE_SWP_UFFD_WP -> PTE_SWP_UFFD
> riscv: _PAGE_UFFD_WP -> _PAGE_UFFD
> _PAGE_SWP_UFFD_WP -> _PAGE_SWP_UFFD
>
> 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>
Reviewed-by: SeongJae Park <sj@kernel.org>
Thanks,
SJ
[...]
next prev parent reply other threads:[~2026-05-08 23:52 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-08 15:55 [PATCH v2 00/14] userfaultfd: working set tracking for VM guest memory Kiryl Shutsemau (Meta)
2026-05-08 15:55 ` [PATCH v2 01/14] mm: decouple protnone helpers from CONFIG_NUMA_BALANCING Kiryl Shutsemau (Meta)
2026-05-08 15:55 ` [PATCH v2 02/14] mm: rename uffd-wp PTE bit macros to uffd Kiryl Shutsemau (Meta)
2026-05-08 23:52 ` SeongJae Park [this message]
2026-05-08 15:55 ` [PATCH v2 03/14] mm: rename uffd-wp PTE accessors " Kiryl Shutsemau (Meta)
2026-05-14 1:31 ` SeongJae Park
2026-05-08 15:55 ` [PATCH v2 04/14] mm: add VM_UFFD_RWP VMA flag Kiryl Shutsemau (Meta)
2026-05-12 16:48 ` Mike Rapoport
2026-05-15 0:29 ` SeongJae Park
2026-05-08 15:55 ` [PATCH v2 05/14] mm: add MM_CP_UFFD_RWP change_protection() flag Kiryl Shutsemau (Meta)
2026-05-12 16:45 ` Mike Rapoport
2026-05-08 15:55 ` [PATCH v2 06/14] mm: preserve RWP marker across PTE rewrites Kiryl Shutsemau (Meta)
2026-05-12 16:59 ` Mike Rapoport
2026-05-08 15:55 ` [PATCH v2 07/14] mm: handle VM_UFFD_RWP in khugepaged, rmap, and GUP Kiryl Shutsemau (Meta)
2026-05-12 17:00 ` Mike Rapoport
2026-05-08 15:55 ` [PATCH v2 08/14] userfaultfd: add UFFDIO_REGISTER_MODE_RWP and UFFDIO_RWPROTECT plumbing Kiryl Shutsemau (Meta)
2026-05-12 17:20 ` Mike Rapoport
2026-05-08 15:55 ` [PATCH v2 09/14] mm/userfaultfd: add RWP fault delivery and expose UFFDIO_REGISTER_MODE_RWP Kiryl Shutsemau (Meta)
2026-05-12 17:29 ` Mike Rapoport
2026-05-08 15:55 ` [PATCH v2 10/14] mm/pagemap: add PAGE_IS_ACCESSED for RWP tracking Kiryl Shutsemau (Meta)
2026-05-12 17:41 ` Mike Rapoport
2026-05-08 15:55 ` [PATCH v2 11/14] userfaultfd: add UFFD_FEATURE_RWP_ASYNC for async fault resolution Kiryl Shutsemau (Meta)
2026-05-12 18:05 ` Mike Rapoport
2026-05-08 15:55 ` [PATCH v2 12/14] userfaultfd: add UFFDIO_SET_MODE for runtime sync/async toggle Kiryl Shutsemau (Meta)
2026-05-12 18:11 ` Mike Rapoport
2026-05-08 15:55 ` [PATCH v2 13/14] selftests/mm: add userfaultfd RWP tests Kiryl Shutsemau (Meta)
2026-05-13 6:06 ` Mike Rapoport
2026-05-08 15:55 ` [PATCH v2 14/14] Documentation/userfaultfd: document RWP working set tracking Kiryl Shutsemau (Meta)
2026-05-13 6:26 ` Mike Rapoport
2026-05-08 17:32 ` [PATCH v2 00/14] userfaultfd: working set tracking for VM guest memory Andrew Morton
2026-05-08 22:48 ` Kiryl Shutsemau
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