On Tue, Apr 13, 2021 at 02:24:16PM -0700, Yang Shi wrote: > A quick grep shows x86_64, PowerPC (book3s), ARM64 and S390 support both > NUMA balancing and THP. But S390 doesn't support THP migration so NUMA > balancing actually can't migrate any misplaced pages. > > Skip make PMD PROT_NONE for such case otherwise CPU cycles may be wasted > by pointless NUMA hinting faults on S390. > > Signed-off-by: Yang Shi <shy828301@xxxxxxxxx> Acked-by: Mel Gorman <mgorman@xxxxxxx> -- Mel Gorman SUSE Labs
