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authorLi Zhang <zhlcindy@linux.vnet.ibm.com>2016-03-17 14:20:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-17 15:09:34 -0700
commit7f2bd006334291178bd2bce3e506d4c7a34a0643 (patch)
tree52af6a72c6e426994e11469dadcb8c7febb29d9e /arch
parent987b3095c2a76ea1b90438f5ace6f9cee354a47d (diff)
downloadlinux-7f2bd006334291178bd2bce3e506d4c7a34a0643.tar.bz2
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 <zhlcindy@linux.vnet.ibm.com> Acked-by: Mel Gorman <mgorman@techsingularity.net> Acked-by: Michael Ellerman <mpe@ellerman.id.au> 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/powerpc/Kconfig1
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