Messages in this thread | | | Date | Wed, 16 Nov 2022 17:28:49 -0500 | From | Peter Xu <> | Subject | Re: [RFC PATCH v2 33/47] userfaultfd: add UFFD_FEATURE_MINOR_HUGETLBFS_HGM |
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On Fri, Oct 21, 2022 at 04:36:49PM +0000, James Houghton wrote: > Userspace must provide this new feature when it calls UFFDIO_API to > enable HGM. Userspace can check if the feature exists in > uffdio_api.features, and if it does not exist, the kernel does not > support and therefore did not enable HGM. > > Signed-off-by: James Houghton <jthoughton@google.com>
It's still slightly a pity that this can only be enabled by an uffd context plus a minor fault, so generic hugetlb users cannot directly leverage this.
The patch itself looks good.
-- Peter Xu
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