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    SubjectRe: [PATCH v7 1/4] userfaultfd: Add UFFD WP Async support
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    On 1/24/23 10:26 PM, Peter Xu wrote:
    > On Mon, Jan 23, 2023 at 03:11:20PM +0500, Muhammad Usama Anjum wrote:
    >>> One thing worth mention is, I think for async wp it doesn't need to be
    >>> restricted by UFFD_USER_MODE_ONLY, because comparing to the sync messages
    >>> it has no risk of being utilized for malicious purposes.
    >> I think with updated handling path updated in do_wp_page() and
    >> wp_huge_pmd() in version, UFFD_USER_MODE_ONLY will not affect us.
    >
    > This is more or less a comment for the design, the new code should work (by
    > bypassing handle_userfaultfd(), where this bit was checked).
    >
    > We'll need an man page update if this feature will be merged [1], and if so
    > it'll need to be updated for the UFFD_USER_MODE_ONLY section regarding to
    > async uffd-wp support too. I think that can also be worked out after the
    > series being accepted first, so just a heads up.
    >
    > [1] https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git
    Thank you for explaining it. Definitely, we'll update the man pages after
    the change has been merged. I've added it to my notes.>

    --
    BR,
    Muhammad Usama Anjum

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