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Date: Thu, 06 Jan 2011 17:02:39 +0000
From: "Jan Beulich" <JBeulich@...ell.com>
To: <mingo@...e.hu>, <tglx@...utronix.de>, <hpa@...or.com>
Cc: <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86: unify "numa=" command line option handling
In order to be able to suppress the use of SRAT tables that 32-bit
Linux can't deal with (possibly leading to a non-bootable system,
without disabling ACPI altogether), move the "numa=" option handling
to common code.
Signed-off-by: Jan Beulich <jbeulich@...ell.com>
---
arch/x86/include/asm/numa_32.h | 2 ++
arch/x86/include/asm/numa_64.h | 1 +
arch/x86/mm/numa.c | 22 ++++++++++++++++++++++
arch/x86/mm/numa_64.c | 24 +++++-------------------
arch/x86/mm/srat_32.c | 1 -
5 files changed, 30 insertions(+), 20 deletions(-)
--- 2.6.37/arch/x86/include/asm/numa_32.h
+++ 2.6.37-x86-numa-option/arch/x86/include/asm/numa_32.h
@@ -1,6 +1,8 @@
#ifndef _ASM_X86_NUMA_32_H
#define _ASM_X86_NUMA_32_H
+extern int numa_off;
+
extern int pxm_to_nid(int pxm);
extern void numa_remove_cpu(int cpu);
--- 2.6.37/arch/x86/include/asm/numa_64.h
+++ 2.6.37-x86-numa-option/arch/x86/include/asm/numa_64.h
@@ -40,6 +40,7 @@ extern void __cpuinit numa_remove_cpu(in
#ifdef CONFIG_NUMA_EMU
#define FAKE_NODE_MIN_SIZE ((u64)64 << 20)
#define FAKE_NODE_MIN_HASH_MASK (~(FAKE_NODE_MIN_SIZE - 1UL))
+void numa_emu_cmdline(char *);
#endif /* CONFIG_NUMA_EMU */
#else
static inline void init_cpu_to_node(void) { }
--- 2.6.37/arch/x86/mm/numa.c
+++ 2.6.37-x86-numa-option/arch/x86/mm/numa.c
@@ -2,6 +2,28 @@
#include <linux/topology.h>
#include <linux/module.h>
#include <linux/bootmem.h>
+#include <asm/numa.h>
+#include <asm/acpi.h>
+
+int __initdata numa_off;
+
+static __init int numa_setup(char *opt)
+{
+ if (!opt)
+ return -EINVAL;
+ if (!strncmp(opt, "off", 3))
+ numa_off = 1;
+#ifdef CONFIG_NUMA_EMU
+ if (!strncmp(opt, "fake=", 5))
+ numa_emu_cmdline(opt + 5);
+#endif
+#ifdef CONFIG_ACPI_NUMA
+ if (!strncmp(opt, "noacpi", 6))
+ acpi_numa = -1;
+#endif
+ return 0;
+}
+early_param("numa", numa_setup);
/*
* Which logical CPUs are on which nodes
--- 2.6.37/arch/x86/mm/numa_64.c
+++ 2.6.37-x86-numa-option/arch/x86/mm/numa_64.c
@@ -30,7 +30,6 @@ s16 apicid_to_node[MAX_LOCAL_APIC] __cpu
[0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE
};
-int numa_off __initdata;
static unsigned long __initdata nodemap_addr;
static unsigned long __initdata nodemap_size;
@@ -263,6 +262,11 @@ static struct bootnode nodes[MAX_NUMNODE
static struct bootnode physnodes[MAX_NUMNODES] __initdata;
static char *cmdline __initdata;
+void __init numa_emu_cmdline(char *str)
+{
+ cmdline = str;
+}
+
static int __init setup_physnodes(unsigned long start, unsigned long end,
int acpi, int k8)
{
@@ -661,24 +665,6 @@ unsigned long __init numa_free_all_bootm
return pages;
}
-static __init int numa_setup(char *opt)
-{
- if (!opt)
- return -EINVAL;
- if (!strncmp(opt, "off", 3))
- numa_off = 1;
-#ifdef CONFIG_NUMA_EMU
- if (!strncmp(opt, "fake=", 5))
- cmdline = opt + 5;
-#endif
-#ifdef CONFIG_ACPI_NUMA
- if (!strncmp(opt, "noacpi", 6))
- acpi_numa = -1;
-#endif
- return 0;
-}
-early_param("numa", numa_setup);
-
#ifdef CONFIG_NUMA
static __init int find_near_online_node(int node)
--- 2.6.37/arch/x86/mm/srat_32.c
+++ 2.6.37-x86-numa-option/arch/x86/mm/srat_32.c
@@ -59,7 +59,6 @@ static struct node_memory_chunk_s __init
static int __initdata num_memory_chunks; /* total number of memory chunks */
static u8 __initdata apicid_to_pxm[MAX_APICID];
-int numa_off __initdata;
int acpi_numa __initdata;
static __init void bad_srat(void)
--
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