Commit d5709812 authored by Joel Fernandes (Google)'s avatar Joel Fernandes (Google) Committed by Stephen Rothwell

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@google.comSigned-off-by: default avatarJoel Fernandes (Google) <joel@joelfernandes.org>
Suggested-by: default avatarKirill A. Shutemov <kirill@shutemov.name>
Acked-by: default avatarKirill A. Shutemov <kirill@shutemov.name>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarStephen Rothwell <sfr@canb.auug.org.au>
parent eedf5308
......@@ -172,6 +172,7 @@ 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
......
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