From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-x242.google.com (mail-pf0-x242.google.com [IPv6:2607:f8b0:400e:c00::242]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4F3B21A0B57 for ; Thu, 3 Mar 2016 18:02:20 +1100 (AEDT) Received: by mail-pf0-x242.google.com with SMTP id q129so828953pfb.3 for ; Wed, 02 Mar 2016 23:02:20 -0800 (PST) From: Li Zhang 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 Subject: [PATCH RFC 2/2] powerpc/mm: Enable page parallel initialisation Date: Thu, 3 Mar 2016 15:01:41 +0800 Message-Id: <1456988501-29046-3-git-send-email-zhlcindy@gmail.com> In-Reply-To: <1456988501-29046-1-git-send-email-zhlcindy@gmail.com> References: <1456988501-29046-1-git-send-email-zhlcindy@gmail.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Li Zhang 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 --- 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