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b=AkW/BTsRTiW5BVztshGqfK2t9rvxsAhno2rDSZ5CYNkjBgUKrrfI2ksfLydAEU0Bh wduSw40cQWzS5nMx5Ne70i7Xs9yQug7APGkOzA7ABYptytJj7abghd+U5yI9ntngup pr62clcslNBKiSS4FCrYaLWOhZnbtIQHDaNFJRQjncpuiYh9JaQRvHBbQJM+hfn7r9 RA3N3pUcAdJdtRIpP4/HYaUe0ntYSL7y5RGzUT+FfHhLy+fAKUyZuVLRKr6KAvihkY NHP9eircNJ8gaM1F541+LA/8qE16l6yt8O0WJlG4Js7f14/CmhRq7qxPtzkPf4oyrl 6mGwZbiWmtkYg== Date: Sun, 24 May 2026 09:32:15 +0300 From: Mike Rapoport To: Kiryl Shutsemau 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, linux-man@vger.kernel.org, alx@kernel.org Subject: Re: [PATCH v3 15/16] userfaultfd.2: Add read-write protect mode Message-ID: References: <20260522133857.552279-1-kirill@shutemov.name> <20260522133857.552279-16-kirill@shutemov.name> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 98E0AC0004 X-Stat-Signature: 534sybebssk5fp6tw1abkf4nt51gnwio X-HE-Tag: 1779604347-297963 X-HE-Meta: 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 td2fwsGE KoDdbkWE+0U39VUC8Zmm4fi9mEnE/3PUE/uwhgmHVkq7DIni8CzmB1ExcfFqNY7EcRj/kAmFjCz8seRr62h+1hcmC9lxgvx1J3poB5gDNX2QswboB2cash9Or2m7gG9v0ODoVH0u5IqhH/RcF0m3njyvqg/kyBrecJTe5pg2Udb+IUd3tkXW6WpSiEbYWhyE9pRPgU4wCzbyvqf1YutR8+d8GYMmv2n+zuxc/66V5mwgtPdNS0P0qLbLr5iLQMCMzJozXYTn+z2nzkLkrzC858BJ5sg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Sun, May 24, 2026 at 01:08:11AM +0100, Kiryl Shutsemau wrote: > On Sat, May 23, 2026 at 01:37:32PM +0300, Mike Rapoport wrote: > > On Fri, May 22, 2026 at 02:38:56PM +0100, Kiryl Shutsemau wrote: > > > From: "Kiryl Shutsemau (Meta)" > > > > > > Read-write protect mode (UFFDIO_REGISTER_MODE_RWP) is supported starting > > > from Linux 7.2. It traps every access -- read or write -- to a present > > > page within a registered range. The matching UAPI consists of: > > > > > > - UFFDIO_REGISTER_MODE_RWP registration-mode bit > > > - UFFD_FEATURE_RWP capability bit > > > - UFFD_FEATURE_RWP_ASYNC async (in-kernel) fault resolution > > > - UFFDIO_RWPROTECT install / remove RWP on a range > > > - UFFDIO_SET_MODE runtime sync/async toggle > > > - UFFD_PAGEFAULT_FLAG_RWP new pagefault.flags bit > > > > > > Document the new registration-mode entry, the "Userfaultfd read-write > > > protect mode" section, the new pagefault flag, and a VERSIONS line. > > > > > > Signed-off-by: Kiryl Shutsemau > > > --- > > > man2/userfaultfd.2 | 147 ++++++++++++++++++++++++++++++++++++++++++++- > > > 1 file changed, 146 insertions(+), 1 deletion(-) > > > > This doesn't apply to the current man-pages tree > > https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git > > > > and reading raw groff hurts eyes too much. > > > > What linux-man tree did you use to generate those? > > Ughh.. Used old github mirror. Will rebase. I found that the man patches in the same thread confuse b4 review, I suppose sashiko also failed to apply because of them. Can you send them as a separate thread please? > -- > Kiryl Shutsemau / Kirill A. Shutemov -- Sincerely yours, Mike.