On Wed, Jun 19, 2019 at 7:20 PM Peter Xu <peterx@xxxxxxxxxx> wrote: > This series implements initial write protection support for > userfaultfd. Currently both shmem and hugetlbfs are not supported > yet, but only anonymous memory. This is the 4nd version of it. > > The latest code can also be found at: > > https://github.com/xzpeter/linux/tree/uffd-wp-merged Hi Peter - I ported the branch you had above on top of v5.4.20 (what I happened to be running locally), and fixed one issue that was causing crashes for me: https://github.com/bpowers/linux/commit/61086b5a0fa4aeb494e86d999926551a4323b84f I wrote a small test program here: https://github.com/plasma-umass/Mesh/blob/master/src/test/userfaultfd-kernel-copy.cc and write protection support for userfaultfd (with eventual shmem support) would be _hugely_ helpful for a userspace memory allocator I'm working on. Is there anything I can do to help get this considered for mainline? We have some time before the 5.7 merge window opens up. Tested-by: Bobby Powers <bobbypowers@xxxxxxxxx>
