From: Li Zhang <zhlcindy@gmail.com>
To: mpe@ellerman.id.au, khandual@linux.vnet.ibm.com,
aneesh.kumar@linux.vnet.ibm.com, mgorman@techsingularity.net
Cc: linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
Li Zhang <zhlcindy@linux.vnet.ibm.com>
Subject: [PATCH RFC 2/2] powerpc/mm: Enable page parallel initialisation
Date: Thu, 3 Mar 2016 15:01:41 +0800 [thread overview]
Message-ID: <1456988501-29046-3-git-send-email-zhlcindy@gmail.com> (raw)
In-Reply-To: <1456988501-29046-1-git-send-email-zhlcindy@gmail.com>
From: Li Zhang <zhlcindy@linux.vnet.ibm.com>
Parallel initialisation has been enabled for X86,
boot time is improved greatly.
On Power8, for small memory, it is improved greatly.
Here is the result from my test on Power8 platform:
For 4GB memory: 57% is improved
For 50GB memory: 22% is improve
Signed-off-by: Li Zhang <zhlcindy@linux.vnet.ibm.com>
---
arch/powerpc/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index e4824fd..83073c2 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
--
2.1.0
next prev parent reply other threads:[~2016-03-03 7:02 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-03 7:01 [PATCH RFC 0/2] mm: Enable page parallel initialisation for Power Li Zhang
2016-03-03 7:01 ` [PATCH RFC 1/2] mm: meminit: initialise more memory for inode/dentry hash tables in early boot Li Zhang
2016-03-03 8:34 ` Mel Gorman
2016-03-03 9:41 ` Anshuman Khandual
2016-03-04 5:21 ` Li Zhang
2016-03-04 8:48 ` Vlastimil Babka
2016-03-04 13:52 ` Li Zhang
2016-03-03 7:01 ` Li Zhang [this message]
2016-03-03 8:34 ` [PATCH RFC 2/2] powerpc/mm: Enable page parallel initialisation Mel Gorman
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