Re: [v2 PATCH 7/7] mm: thp: skip make PMD PROT_NONE if THP migration is not supported
From: Mel Gorman <mgorman@suse.de>
Date: 2021-05-17 15:46:49
Also in:
linux-s390, lkml
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 <redacted>
Acked-by: Mel Gorman <mgorman@suse.de> -- Mel Gorman SUSE Labs