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| author | Li Zhang <zhlcindy@linux.vnet.ibm.com> | 2016-03-17 22:20:19 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-17 23:09:34 +0100 |
| commit | 7f2bd006334291178bd2bce3e506d4c7a34a0643 (patch) | |
| tree | 52af6a72c6e426994e11469dadcb8c7febb29d9e /arch/powerpc | |
| parent | mm: meminit: initialise more memory for inode/dentry hash tables in early boot (diff) | |
| download | linux-7f2bd006334291178bd2bce3e506d4c7a34a0643.tar.xz linux-7f2bd006334291178bd2bce3e506d4c7a34a0643.zip | |
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/powerpc')
| -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 |