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

[Kiryl Shutsemau]

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)" <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?

Ughh.. Used old github mirror. Will rebase.

-- 
  Kiryl Shutsemau / Kirill A. Shutemov