linux-kernel - [tip:x86/numa] x86, numa: Reduce minimum fake node size to 32M

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Message-ID: <tip-34dc9e74968ef4b582c3815b0124d88a68dfabef@git.kernel.org>
Date:	Fri, 24 Dec 2010 01:36:50 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, hpa@...ux.intel.com, rientjes@...gle.com
Subject: [tip:x86/numa] x86, numa: Reduce minimum fake node size to 32M

Commit-ID:  34dc9e74968ef4b582c3815b0124d88a68dfabef
Gitweb:     http://git.kernel.org/tip/34dc9e74968ef4b582c3815b0124d88a68dfabef
Author:     David Rientjes <rientjes@...gle.com>
AuthorDate: Wed, 22 Dec 2010 17:23:40 -0800
Committer:  H. Peter Anvin <hpa@...ux.intel.com>
CommitDate: Thu, 23 Dec 2010 15:27:10 -0800

x86, numa: Reduce minimum fake node size to 32M

This patch changes the minimum fake node size from 64MB to 32MB so it is
possible to test NUMA code at a greater scale on smaller machines
(64 nodes on a 2G machine, 1024 nodes on 32G machine with
CONFIG_NODES_SHIFT=10).

Signed-off-by: David Rientjes <rientjes@...gle.com>
LKML-Reference: <alpine.DEB.2.00.1012221700590.3701@...no.kir.corp.google.com>
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
---
 arch/x86/include/asm/numa_64.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/include/asm/numa_64.h b/arch/x86/include/asm/numa_64.h
index 823e070..5ae8728 100644
--- a/arch/x86/include/asm/numa_64.h
+++ b/arch/x86/include/asm/numa_64.h
@@ -38,7 +38,7 @@ extern void __cpuinit numa_add_cpu(int cpu);
 extern void __cpuinit numa_remove_cpu(int cpu);
 
 #ifdef CONFIG_NUMA_EMU
-#define FAKE_NODE_MIN_SIZE	((u64)64 << 20)
+#define FAKE_NODE_MIN_SIZE	((u64)32 << 20)
 #define FAKE_NODE_MIN_HASH_MASK	(~(FAKE_NODE_MIN_SIZE - 1UL))
 #endif /* CONFIG_NUMA_EMU */
 #else
--
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