linux-kernel - [patch] srat: do not register nodes beyond e820 map

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Date:	Tue, 5 May 2009 12:50:02 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Ingo Molnar <mingo@...e.hu>
cc:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>, alex.shi@...el.com,
	linux-kernel@...r.kernel.org, Andi Kleen <andi@...stfloor.org>,
	Jack Steiner <steiner@....com>
Subject: [patch] srat: do not register nodes beyond e820 map

The mem= option will truncate the memory map at a specified address so 
it's not possible to register nodes with memory beyond the e820 upper 
bound.

unparse_node() is only called when then node had memory associated with 
it, although with the mem= option it is no longer addressable.

Reported-by: "Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>
Signed-off-by: David Rientjes <rientjes@...gle.com>
---
 Ingo, this fixes the problem reported by "Zhang, Yanmin" and is needed
 for 2.6.30-rc5.

 arch/x86/mm/srat_64.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -361,6 +361,7 @@ static void __init unparse_node(int node)
 {
 	int i;
 	node_clear(node, nodes_parsed);
+	node_clear(node, cpu_nodes_parsed);
 	for (i = 0; i < MAX_LOCAL_APIC; i++) {
 		if (apicid_to_node[i] == node)
 			apicid_to_node[i] = NUMA_NO_NODE;
--
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