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
