Messages in this thread | | | Date | Thu, 18 Feb 2021 15:32:14 -0500 | From | Peter Xu <> | Subject | Re: [PATCH v2 4/4] hugetlb/userfaultfd: Unshare all pmds for hugetlbfs when register wp |
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On Thu, Feb 18, 2021 at 10:32:00AM -0800, Axel Rasmussen wrote: > > @@ -1448,6 +1449,9 @@ static int userfaultfd_register(struct userfaultfd_ctx *ctx, > > vma->vm_flags = new_flags; > > vma->vm_userfaultfd_ctx.ctx = ctx; > > > > + if (is_vm_hugetlb_page(vma) && uffd_disable_huge_pmd_share(vma)) > > + hugetlb_unshare_all_pmds(vma); > > This line yields the following error, if building with: > # CONFIG_CMA is not set > > ./fs/userfaultfd.c:1459: undefined reference to `hugetlb_unshare_all_pmds'
Ouch.. Axel, you mean CONFIG_HUGETLBFS rather than CONFIG_CMA, am I right?
-- Peter Xu
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