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| author | Joel Fernandes (Google) <joel@joelfernandes.org> | 2019-01-03 15:28:41 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-01-04 13:13:48 -0800 |
| commit | 9f132f7e145506efc0744426cb338b18a54afc3b (patch) | |
| tree | 7d04ec135a84c0c4fb73c67944098f558898995d /arch | |
| parent | 2c91bd4a4e2e530582d6fd643ea7b86b27907151 (diff) | |
| download | lwn-9f132f7e145506efc0744426cb338b18a54afc3b.tar.gz lwn-9f132f7e145506efc0744426cb338b18a54afc3b.zip | |
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.com
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Suggested-by: Kirill A. Shutemov <kirill@shutemov.name>
Acked-by: Kirill 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index e260460210e1..6185d4f33296 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -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 |