The patch titled
Subject: powerpc/mm: enable move pmd/pud
has been added to the -mm tree. Its filename is
powerpc-mm-enable-move-pmd-pud.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/powerpc-mm-enable-move-pmd-pud.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/powerpc-mm-enable-move-pmd-pud.patch
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------------------------------------------------------
From: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxx>
Subject: powerpc/mm: enable move pmd/pud
mremap HAVE_MOVE_PMD/PUD optimization time comparison for 1GB region:
1GB mremap - Source PTE-aligned, Destination PTE-aligned
mremap time: 1127034ns
1GB mremap - Source PMD-aligned, Destination PMD-aligned
mremap time: 508817ns
1GB mremap - Source PUD-aligned, Destination PUD-aligned
mremap time: 23046ns
Link: https://lkml.kernel.org/r/20210422054323.150993-10-aneesh.kumar@xxxxxxxxxxxxx
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
Cc: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Cc: Joel Fernandes <joel@xxxxxxxxxxxxxxxxx>
Cc: Kalesh Singh <kaleshsingh@xxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/platforms/Kconfig.cputype | 2 ++
1 file changed, 2 insertions(+)
--- a/arch/powerpc/platforms/Kconfig.cputype~powerpc-mm-enable-move-pmd-pud
+++ a/arch/powerpc/platforms/Kconfig.cputype
@@ -96,6 +96,8 @@ config PPC_BOOK3S_64
select PPC_FPU
select PPC_HAVE_PMU_SUPPORT
select HAVE_ARCH_TRANSPARENT_HUGEPAGE
+ select HAVE_MOVE_PMD
+ select HAVE_MOVE_PUD
select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
select ARCH_ENABLE_PMD_SPLIT_PTLOCK
select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
_
Patches currently in -mm which might be from aneesh.kumar@xxxxxxxxxxxxx are
selftest-mremap_test-update-the-test-to-handle-pagesize-other-than-4k.patch
selftest-mremap_test-avoid-crash-with-static-build.patch
mm-mremap-use-pmd-pud_poplulate-to-update-page-table-entries.patch
powerpc-mm-book3s64-fix-possible-build-error.patch
powerpc-mm-book3s64-update-tlb-flush-routines-to-take-a-page-walk-cache-flush-argument.patch
mm-mremap-use-range-flush-that-does-tlb-and-page-walk-cache-flush.patch
mm-mremap-move-tlb-flush-outside-page-table-lock.patch
mm-mremap-allow-arch-runtime-override.patch
powerpc-mm-enable-move-pmd-pud.patch
