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[v8,3/3] powerpc/mm: Enable HAVE_MOVE_PMD support

Message ID 20210616045735.374532-4-aneesh.kumar@linux.ibm.com (mailing list archive)
State New, archived
Headers show
Series Speedup mremap on ppc64 | expand

Commit Message

Aneesh Kumar K.V June 16, 2021, 4:57 a.m. UTC 
mremap HAVE_MOVE_PMD/PUD optimization time comparison for 1GB region:
1GB mremap - Source PTE-aligned, Destination PTE-aligned
  mremap time:      2292772ns
1GB mremap - Source PMD-aligned, Destination PMD-aligned
  mremap time:      1158928ns
1GB mremap - Source PUD-aligned, Destination PUD-aligned
  mremap time:        63886ns

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
 arch/powerpc/platforms/Kconfig.cputype | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index f998e655b570..be8ceb5bece4 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -101,6 +101,8 @@  config PPC_BOOK3S_64
 	select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
 	select ARCH_SUPPORTS_HUGETLBFS
 	select ARCH_SUPPORTS_NUMA_BALANCING
+	select HAVE_MOVE_PMD
+	select HAVE_MOVE_PUD
 	select IRQ_WORK
 	select PPC_MM_SLICES
 	select PPC_HAVE_KUEP