linux-kernel - [PATCH 1/1] i383 numa: fix numaq/summit apicid conflict

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Date:	Tue, 03 Oct 2006 18:25:52 -0700
From:	keith mannthey <kmannth@...ibm.com>
To:	torvalds@...l.org
Cc:	lkml <linux-kernel@...r.kernel.org>, andrew <akpm@...l.org>,
	apw@...dowen.org
Subject: [PATCH 1/1]  i383 numa: fix numaq/summit apicid conflict

From: Keith Mannthey <kmannth@...ibm.com> 

  This patch allows numaq to properly align cpus to their given node
during boot. Pass logical apicid to apicid_to_node and allow the summit
sub-arch to use physical apicid (hard_smp_processor_id()). 
  Tested against numaq and summit based systems with no issues. against
2.6.18-git18. 

Signed-off-by: Keith Mannthey  <kmannth@...ibm.com>
---
 arch/i386/kernel/smpboot.c               |    2 +-
 include/asm-i386/mach-summit/mach_apic.h |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff -urN linux-2.6.18/arch/i386/kernel/smpboot.c linux-2.6.18-git18/arch/i386/kernel/smpboot.c
--- linux-2.6.18/arch/i386/kernel/smpboot.c	2006-10-02 02:59:49.000000000 -0700
+++ linux-2.6.18-git18/arch/i386/kernel/smpboot.c	2006-10-02 00:36:52.000000000 -0700
@@ -648,7 +648,7 @@
 {
 	int cpu = smp_processor_id();
 	int apicid = logical_smp_processor_id();
-	int node = apicid_to_node(hard_smp_processor_id());
+	int node = apicid_to_node(apicid);
 
 	if (!node_online(node))
 		node = first_online_node;
diff -urN linux-2.6.18/include/asm-i386/mach-summit/mach_apic.h linux-2.6.18-git18/include/asm-i386/mach-summit/mach_apic.h
--- linux-2.6.18/include/asm-i386/mach-summit/mach_apic.h	2006-10-02 02:59:54.000000000 -0700
+++ linux-2.6.18-git18/include/asm-i386/mach-summit/mach_apic.h	2006-10-02 00:51:24.000000000 -0700
@@ -88,7 +88,7 @@
 
 static inline int apicid_to_node(int logical_apicid)
 {
-	return apicid_2_node[logical_apicid];
+	return apicid_2_node[hard_smp_processor_id()];
 }
 
 /* Mapping from cpu number to logical apicid */


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