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Date: Tue, 3 Jun 2008 10:25:54 -0700
From: Yinghai Lu <yhlu.kernel@...il.com>
To: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>,
Andrew Morton <akpm@...ux-foundation.org>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86: early check if one system is numaq v2
so could fallback one node numa
v2: using found_numaq with MP_processor_info and MP_bus_info
Signed-off-by: Yinghai Lu <yhlu.kernel@...il.com>
Index: linux-2.6/arch/x86/kernel/mpparse.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/mpparse.c
+++ linux-2.6/arch/x86/kernel/mpparse.c
@@ -70,7 +70,10 @@ static void __cpuinit MP_processor_info(
return;
}
#ifdef CONFIG_X86_NUMAQ
- apicid = mpc_apic_id(m, translation_table[mpc_record]);
+ if (found_numaq)
+ apicid = mpc_apic_id(m, translation_table[mpc_record]);
+ else
+ apicid = m->mpc_apicid;
#else
apicid = m->mpc_apicid;
#endif
@@ -91,7 +94,8 @@ static void __init MP_bus_info(struct mp
str[6] = 0;
#ifdef CONFIG_X86_NUMAQ
- mpc_oem_bus_info(m, str, translation_table[mpc_record]);
+ if (found_numaq)
+ mpc_oem_bus_info(m, str, translation_table[mpc_record]);
#else
printk(KERN_INFO "Bus #%d is %s\n", m->mpc_busid, str);
#endif
@@ -112,7 +116,8 @@ static void __init MP_bus_info(struct mp
#endif
} else if (strncmp(str, BUSTYPE_PCI, sizeof(BUSTYPE_PCI) - 1) == 0) {
#ifdef CONFIG_X86_NUMAQ
- mpc_oem_pci_bus(m, translation_table[mpc_record]);
+ if (found_numaq)
+ mpc_oem_pci_bus(m, translation_table[mpc_record]);
#endif
clear_bit(m->mpc_busid, mp_bus_not_pci);
#if defined(CONFIG_EISA) || defined (CONFIG_MCA)
@@ -321,6 +326,9 @@ static inline void mps_oem_check(struct
{
if (strncmp(oem, "IBM NUMA", 8))
printk("Warning! May not be a NUMA-Q system!\n");
+ else
+ found_numaq = 1;
+
if (mpc->mpc_oemptr)
smp_read_mpc_oem((struct mp_config_oemtable *)mpc->mpc_oemptr,
mpc->mpc_oemsize);
Index: linux-2.6/arch/x86/kernel/numaq_32.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/numaq_32.c
+++ linux-2.6/arch/x86/kernel/numaq_32.c
@@ -31,9 +31,12 @@
#include <asm/numaq.h>
#include <asm/topology.h>
#include <asm/processor.h>
+#include <asm/mpspec.h>
#define MB_TO_PAGES(addr) ((addr) << (20 - PAGE_SHIFT))
+int found_numaq;
+
/*
* Function: smp_dump_qct()
*
@@ -67,13 +70,24 @@ static void __init smp_dump_qct(void)
}
}
-/*
- * Unlike Summit, we don't really care to let the NUMA-Q
- * fall back to flat mode. Don't compile for NUMA-Q
- * unless you really need it!
- */
+static __init void early_check_numaq(void)
+{
+ /*
+ * Find possible boot-time SMP configuration:
+ */
+ early_find_smp_config();
+ /*
+ * get boot-time SMP configuration:
+ */
+ if (smp_found_config)
+ early_get_smp_config();
+}
+
int __init get_memcfg_numaq(void)
{
+ early_check_numaq();
+ if (!found_numaq)
+ return 0;
smp_dump_qct();
return 1;
}
Index: linux-2.6/include/asm-x86/numaq.h
===================================================================
--- linux-2.6.orig/include/asm-x86/numaq.h
+++ linux-2.6/include/asm-x86/numaq.h
@@ -28,6 +28,7 @@
#ifdef CONFIG_X86_NUMAQ
+extern int found_numaq;
extern int get_memcfg_numaq(void);
/*
Index: linux-2.6/include/asm-x86/mpspec.h
===================================================================
--- linux-2.6.orig/include/asm-x86/mpspec.h
+++ linux-2.6/include/asm-x86/mpspec.h
@@ -21,11 +21,11 @@ extern int pic_mode;
/* Each PCI slot may be a combo card with its own bus. 4 IRQ pins per slot. */
#define MAX_IRQ_SOURCES (MAX_MP_BUSSES * 4)
+#endif
+
extern void early_find_smp_config(void);
extern void early_get_smp_config(void);
-#endif
-
#if defined(CONFIG_MCA) || defined(CONFIG_EISA)
extern int mp_bus_id_to_type[MAX_MP_BUSSES];
#endif
--
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