Re: [PATCH v3 15/16] userfaultfd.2: Add read-write protect mode

[Mike Rapoport]

On Fri, May 22, 2026 at 02:38:56PM +0100, Kiryl Shutsemau wrote:
> From: "Kiryl Shutsemau (Meta)" <kas@xxxxxxxxxx>
> 
> 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 <kas@xxxxxxxxxx>
> ---
>  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?

-- 
Sincerely yours,
Mike.