linux-kernel - [patch -mm 5/7] x86_64: disable alien cache for fake numa

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Message-ID: <Pine.LNX.4.64.0703010130310.10045@chino.kir.corp.google.com>
Date:	Thu, 1 Mar 2007 09:13:13 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Andi Kleen <ak@...e.de>, Paul Menage <menage@...gle.com>,
	linux-kernel@...r.kernel.org
Subject: [patch -mm 5/7] x86_64: disable alien cache for fake numa

Disables using alien cache for slab when NUMA emulation is being used.

Cc: Andi Kleen <ak@...e.de>
Signed-off-by: Paul Menage <menage@...gle.com>
Signed-off-by: David Rientjes <rientjes@...gle.com>
---
 arch/x86_64/mm/numa.c |    2 ++
 mm/slab.c             |    2 +-
 2 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/arch/x86_64/mm/numa.c b/arch/x86_64/mm/numa.c
--- a/arch/x86_64/mm/numa.c
+++ b/arch/x86_64/mm/numa.c
@@ -280,6 +280,7 @@ void __init numa_init_array(void)
 	PAGE_SHIFT)
 
 static struct bootnode physical_node_map[MAX_NUMNODES];
+extern int use_alien_caches;
 char *cmdline __initdata;
 int numa_emu;
 
@@ -512,6 +513,7 @@ out:
 						nodes[i].end >> PAGE_SHIFT);
  		setup_node_bootmem(i, nodes[i].start, nodes[i].end);
 	}
+	use_alien_caches = 0;
  	numa_init_array();
  	return 0;
 }
diff --git a/mm/slab.c b/mm/slab.c
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -889,7 +889,7 @@ static void __slab_error(const char *function, struct kmem_cache *cachep,
  * line
   */
 
-static int use_alien_caches __read_mostly = 1;
+int use_alien_caches __read_mostly = 1;
 static int __init noaliencache_setup(char *s)
 {
 	use_alien_caches = 0;
-
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