On Mon, Feb 01, 2021 at 02:33:20PM -0800, Mike Kravetz wrote:
> On 1/28/21 2:48 PM, Axel Rasmussen wrote:
> > From: Peter Xu
> >
> > Huge pmd sharing for hugetlbfs is racy with userfaultfd-wp because
> > userfaultfd-wp is always based on pgtable entries, so they cannot be shared.
> >
> > Walk th
On 1/28/21 2:48 PM, Axel Rasmussen wrote:
> From: Peter Xu
>
> Huge pmd sharing for hugetlbfs is racy with userfaultfd-wp because
> userfaultfd-wp is always based on pgtable entries, so they cannot be shared.
>
> Walk the hugetlb range and unshare all such mappings if there is, right before
> UF
From: Peter Xu
Huge pmd sharing for hugetlbfs is racy with userfaultfd-wp because
userfaultfd-wp is always based on pgtable entries, so they cannot be shared.
Walk the hugetlb range and unshare all such mappings if there is, right before
UFFDIO_REGISTER will succeed and return to userspace.
Thi
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