diff options
| author | Li Zhang <[email protected]> | 2016-03-17 14:20:19 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2016-03-17 15:09:34 -0700 |
| commit | 7f2bd006334291178bd2bce3e506d4c7a34a0643 (patch) | |
| tree | 52af6a72c6e426994e11469dadcb8c7febb29d9e | |
| parent | 987b3095c2a76ea1b90438f5ace6f9cee354a47d (diff) | |
powerpc/mm: enable page parallel initialisation
Parallel initialisation has been enabled for X86, boot time is improved
greatly. On Power8, it is improved greatly for small memory. Here is
the result from my test on Power8 platform:
For 4GB of memory, boot time is improved by 59%, from 24.5s to 10s.
For 50GB memory, boot time is improved by 22%, from 56.8s to 43.8s.
Signed-off-by: Li Zhang <[email protected]>
Acked-by: Mel Gorman <[email protected]>
Acked-by: Michael Ellerman <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | arch/powerpc/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 832cc461d0af..a030e5ecb10b 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -158,6 +158,7 @@ config PPC select ARCH_HAS_DEVMEM_IS_ALLOWED select HAVE_ARCH_SECCOMP_FILTER select ARCH_HAS_UBSAN_SANITIZE_ALL + select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT config GENERIC_CSUM def_bool CPU_LITTLE_ENDIAN |