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@xxxxxxxxxx> 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
