linux-kernel - [tip:x86/urgent] x86: Increase CONFIG_NODES

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Message-ID: <tip-51591e31dcb3716f03f962e26ec36a029aa46340@git.kernel.org>
Date:	Fri, 2 Apr 2010 19:06:39 GMT
From:	tip-bot for David Rientjes <rientjes@...gle.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	tglx@...utronix.de, rientjes@...gle.com, mingo@...e.hu
Subject: [tip:x86/urgent] x86: Increase CONFIG_NODES_SHIFT max to 10

Commit-ID:  51591e31dcb3716f03f962e26ec36a029aa46340
Gitweb:     http://git.kernel.org/tip/51591e31dcb3716f03f962e26ec36a029aa46340
Author:     David Rientjes <rientjes@...gle.com>
AuthorDate: Thu, 25 Mar 2010 15:39:27 -0700
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Fri, 2 Apr 2010 19:09:31 +0200

x86: Increase CONFIG_NODES_SHIFT max to 10

Some larger systems require more than 512 nodes, so increase the
maximum CONFIG_NODES_SHIFT to 10 for a new max of 1024 nodes.

This was tested with numa=fake=64M on systems with more than
64GB of RAM. A total of 1022 nodes were initialized.

Successfully builds with no additional warnings on x86_64
allyesconfig.

( No effect on any existing config. Newly enabled CONFIG_MAXSMP=y
  will see the new default. )

Signed-off-by: David Rientjes <rientjes@...gle.com>
LKML-Reference: <alpine.DEB.2.00.1003251538060.8589@...no.kir.corp.google.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 arch/x86/Kconfig |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 0eacb1f..9458685 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1216,8 +1216,8 @@ config NUMA_EMU
 
 config NODES_SHIFT
 	int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP
-	range 1 9
-	default "9" if MAXSMP
+	range 1 10
+	default "10" if MAXSMP
 	default "6" if X86_64
 	default "4" if X86_NUMAQ
 	default "3"
--
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