The patch titled
Subject: mm: select HAVE_MOVE_PMD on x86 for faster mremap
has been added to the -mm tree. Its filename is
mm-select-have_move_pmd-in-x86-for-faster-mremap.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-select-have_move_pmd-in-x86-for-faster-mremap.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-select-have_move_pmd-in-x86-for-faster-mremap.patch
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------------------------------------------------------
From: "Joel Fernandes (Google)" <joel@xxxxxxxxxxxxxxxxx>
Subject: mm: select HAVE_MOVE_PMD on x86 for faster mremap
Moving page-tables at the PMD-level on x86 is known to be safe. Enable
this option so that we can do fast mremap when possible.
Link: http://lkml.kernel.org/r/20181108181201.88826-4-joelaf@xxxxxxxxxx
Signed-off-by: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx>
Suggested-by: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx>
Acked-by: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx>
Cc: Julia Lawall <Julia.Lawall@xxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: William Kucharski <william.kucharski@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/Kconfig | 1 +
1 file changed, 1 insertion(+)
--- a/arch/x86/Kconfig~mm-select-have_move_pmd-in-x86-for-faster-mremap
+++ a/arch/x86/Kconfig
@@ -173,6 +173,7 @@ config X86
select HAVE_MEMBLOCK_NODE_MAP
select HAVE_MIXED_BREAKPOINTS_REGS
select HAVE_MOD_ARCH_SPECIFIC
+ select HAVE_MOVE_PMD
select HAVE_NMI
select HAVE_OPROFILE
select HAVE_OPTPROBES
_
Patches currently in -mm which might be from joel@xxxxxxxxxxxxxxxxx are
mm-treewide-remove-unused-address-argument-from-pte_alloc-functions-v2.patch
mm-speed-up-mremap-by-20x-on-large-regions-v5.patch
mm-select-have_move_pmd-in-x86-for-faster-mremap.patch
