[PATCH 09/21] userfaultfd: prevent khugepaged to merge if userfaultfd is armed

If userfaultfd is armed on a certain vma we can't "fill" the holes with zeroes or we'll break the userland on demand paging. The holes if the userfault is armed, are really missing information (not zeroes) that the userland has to load from network or elsewhere. The same issue happens for

[PATCH 09/21] userfaultfd: prevent khugepaged to merge if userfaultfd is armed

If userfaultfd is armed on a certain vma we can't fill the holes with zeroes or we'll break the userland on demand paging. The holes if the userfault is armed, are really missing information (not zeroes) that the userland has to load from network or elsewhere. The same issue happens for