[PATCH 08/10] x86: Change NR_CPUS arrays in numa_64 V3

From: travis
Date: Wed Jan 16 2008 - 12:13:21 EST

Change the following static arrays sized by NR_CPUS to
per_cpu data variables:

char cpu_to_node_map[NR_CPUS];


Signed-off-by: Mike Travis <travis@xxxxxxx>
Reviewed-by: Christoph Lameter <clameter@xxxxxxx>
---
V1->V2:
- Removed extraneous casts
- Fix !NUMA builds with '#ifdef CONFIG_NUMA"

V2->V3:
- add early_cpu_to_node function to keep cpu_to_node efficient
- move and rename smp_set_apicids() to setup_percpu_maps()
- call setup_percpu_maps() as early as possible
---
arch/x86/kernel/setup64.c | 37 +++++++++++++++++++++++++++++++++++--
arch/x86/kernel/setup_64.c | 6 +++++-
arch/x86/kernel/smpboot_64.c | 27 ++-------------------------
arch/x86/mm/numa_64.c | 20 ++++++++++++++++----
arch/x86/mm/srat_64.c | 5 +++--
include/asm-x86/numa_64.h | 9 ---------
include/asm-x86/topology.h | 23 +++++++++++++++++++++--
mm/page_alloc.c | 2 +-
net/sunrpc/svc.c | 1 +
9 files changed, 84 insertions(+), 46 deletions(-)

--- a/arch/x86/kernel/setup64.c
+++ b/arch/x86/kernel/setup64.c
@@ -80,6 +80,36 @@ static int __init nonx32_setup(char *str
__setup("noexec32=", nonx32_setup);

/*
+ * Copy data used in early init routines from the initial arrays to the
+ * per cpu data areas. These arrays then become expendable and the *_ptrs
+ * are zeroed indicating that the static arrays are gone.
+ */
+void __init setup_percpu_maps(void)
+{
+ int cpu;
+
+ for_each_possible_cpu(cpu) {
+ if (per_cpu_offset(cpu)) {
+ per_cpu(x86_cpu_to_apicid, cpu) =
+ x86_cpu_to_apicid_init[cpu];
+#ifdef CONFIG_NUMA
+ per_cpu(x86_cpu_to_node_map, cpu) =
+ x86_cpu_to_node_map_init[cpu];
+#endif
+ }
+ else
+ printk(KERN_NOTICE "per_cpu_offset zero for cpu %d\n",
+ cpu);
+ }
+
+ /* indicate the early static arrays are gone */
+ x86_cpu_to_apicid_early_ptr = NULL;
+#ifdef CONFIG_NUMA
+ x86_cpu_to_node_map_early_ptr = NULL;
+#endif
+}
+
+/*
* Great future plan:
* Declare PDA itself and support (irqstack,tss,pgd) as per cpu data.
* Always point %gs to its beginning
@@ -100,18 +130,21 @@ void __init setup_per_cpu_areas(void)
for_each_cpu_mask (i, cpu_possible_map) {
char *ptr;

- if (!NODE_DATA(cpu_to_node(i))) {
+ if (!NODE_DATA(early_cpu_to_node(i))) {
printk("cpu with no node %d, num_online_nodes %d\n",
i, num_online_nodes());
ptr = alloc_bootmem_pages(size);
} else {
- ptr = alloc_bootmem_pages_node(NODE_DATA(cpu_to_node(i)), size);
+ ptr = alloc_bootmem_pages_node(NODE_DATA(early_cpu_to_node(i)), size);
}
if (!ptr)
panic("Cannot allocate cpu data for CPU %d\n", i);
cpu_pda(i)->data_offset = ptr - __per_cpu_start;
memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
}
+
+ /* setup percpu data maps early */
+ setup_percpu_maps();
}

void pda_init(int cpu)
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -63,6 +63,7 @@
#include <asm/cacheflush.h>
#include <asm/mce.h>
#include <asm/ds.h>
+#include <asm/topology.h>

#ifdef CONFIG_PARAVIRT
#include <asm/paravirt.h>
@@ -372,8 +373,11 @@ void __init setup_arch(char **cmdline_p)
io_delay_init();

#ifdef CONFIG_SMP
- /* setup to use the static apicid table during kernel startup */
+ /* setup to use the early static init tables during kernel startup */
x86_cpu_to_apicid_early_ptr = (void *)&x86_cpu_to_apicid_init;
+#ifdef CONFIG_NUMA
+ x86_cpu_to_node_map_early_ptr = (void *)&x86_cpu_to_node_map_init;
+#endif
#endif

#ifdef CONFIG_ACPI
--- a/arch/x86/kernel/smpboot_64.c
+++ b/arch/x86/kernel/smpboot_64.c
@@ -702,7 +702,7 @@ do_rest:
if (boot_error) {
cpu_clear(cpu, cpu_callout_map); /* was set here (do_boot_cpu()) */
clear_bit(cpu, (unsigned long *)&cpu_initialized); /* was set by cpu_init() */
- clear_node_cpumask(cpu); /* was set by numa_add_cpu */
+ clear_bit(cpu, (unsigned long *)&node_to_cpumask_map[cpu_to_node(cpu)]);
cpu_clear(cpu, cpu_present_map);
cpu_clear(cpu, cpu_possible_map);
per_cpu(x86_cpu_to_apicid, cpu) = BAD_APICID;
@@ -851,28 +851,6 @@ static int __init smp_sanity_check(unsig
return 0;
}

-/*
- * Copy data used in early init routines from the initial arrays to the
- * per cpu data areas. These arrays then become expendable and the
- * *_ptrs are zeroed indicating that the static arrays are gone.
- */
-void __init smp_set_apicids(void)
-{
- int cpu;
-
- for_each_possible_cpu(cpu) {
- if (per_cpu_offset(cpu))
- per_cpu(x86_cpu_to_apicid, cpu) =
- x86_cpu_to_apicid_init[cpu];
- else
- printk(KERN_NOTICE "per_cpu_offset zero for cpu %d\n",
- cpu);
- }
-
- /* indicate the early static arrays are gone */
- x86_cpu_to_apicid_early_ptr = NULL;
-}
-
static void __init smp_cpu_index_default(void)
{
int i;
@@ -895,7 +873,6 @@ void __init smp_prepare_cpus(unsigned in
smp_cpu_index_default();
current_cpu_data = boot_cpu_data;
current_thread_info()->cpu = 0; /* needed? */
- smp_set_apicids();
set_cpu_sibling_map(0);

if (smp_sanity_check(max_cpus) < 0) {
@@ -1049,7 +1026,7 @@ void remove_cpu_from_maps(void)
cpu_clear(cpu, cpu_callout_map);
cpu_clear(cpu, cpu_callin_map);
clear_bit(cpu, (unsigned long *)&cpu_initialized); /* was set by cpu_init() */
- clear_node_cpumask(cpu);
+ clear_bit(cpu, (unsigned long *)&node_to_cpumask_map[cpu_to_node(cpu)]);
}

int __cpu_disable(void)
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -31,10 +31,14 @@ bootmem_data_t plat_node_bdata[MAX_NUMNO

struct memnode memnode;

-u16 cpu_to_node_map[NR_CPUS] __read_mostly = {
+u16 x86_cpu_to_node_map_init[NR_CPUS] __initdata = {
[0 ... NR_CPUS-1] = NUMA_NO_NODE
};
-EXPORT_SYMBOL(cpu_to_node_map);
+void *x86_cpu_to_node_map_early_ptr;
+EXPORT_SYMBOL(x86_cpu_to_node_map_init);
+EXPORT_SYMBOL(x86_cpu_to_node_map_early_ptr);
+DEFINE_PER_CPU(u16, x86_cpu_to_node_map) = NUMA_NO_NODE;
+EXPORT_PER_CPU_SYMBOL(x86_cpu_to_node_map);

u16 apicid_to_node[MAX_LOCAL_APIC] __cpuinitdata = {
[0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE
@@ -545,7 +549,7 @@ void __init numa_initmem_init(unsigned l
node_set(0, node_possible_map);
for (i = 0; i < NR_CPUS; i++)
numa_set_node(i, 0);
- /* we can't use cpumask_of_cpu() yet */
+ /* cpumask_of_cpu() may not be available during early startup */
memset(&node_to_cpumask_map[0], 0, sizeof(node_to_cpumask_map[0]));
cpu_set(0, node_to_cpumask_map[0]);
e820_register_active_regions(0, start_pfn, end_pfn);
@@ -559,8 +563,16 @@ __cpuinit void numa_add_cpu(int cpu)

void __cpuinit numa_set_node(int cpu, int node)
{
+ u16 *cpu_to_node_map = x86_cpu_to_node_map_early_ptr;
+
cpu_pda(cpu)->nodenumber = node;
- cpu_to_node_map[cpu] = node;
+
+ if(cpu_to_node_map)
+ cpu_to_node_map[cpu] = node;
+ else if(per_cpu_offset(cpu))
+ per_cpu(x86_cpu_to_node_map, cpu) = node;
+ else
+ Dprintk(KERN_INFO "Setting node for non-present cpu %d\n", cpu);
}

unsigned long __init numa_free_all_bootmem(void)
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -382,9 +382,10 @@ int __init acpi_scan_nodes(unsigned long
setup_node_bootmem(i, nodes[i].start, nodes[i].end);

for (i = 0; i < NR_CPUS; i++) {
- if (cpu_to_node(i) == NUMA_NO_NODE)
+ int node = cpu_to_node(i);
+ if (node == NUMA_NO_NODE)
continue;
- if (!node_isset(cpu_to_node(i), node_possible_map))
+ if (!node_isset(node, node_possible_map))
numa_set_node(i, NUMA_NO_NODE);
}
numa_init_array();
--- a/include/asm-x86/numa_64.h
+++ b/include/asm-x86/numa_64.h
@@ -29,17 +29,8 @@ extern void setup_node_bootmem(int nodei

#ifdef CONFIG_NUMA
extern void __init init_cpu_to_node(void);
-
-static inline void clear_node_cpumask(int cpu)
-{
- clear_bit(cpu, (unsigned long *)&node_to_cpumask_map[cpu_to_node(cpu)]);
-}
-
#else
#define init_cpu_to_node() do {} while (0)
-#define clear_node_cpumask(cpu) do {} while (0)
#endif

-#define NUMA_NO_NODE 0xffff
-
#endif
--- a/include/asm-x86/topology.h
+++ b/include/asm-x86/topology.h
@@ -30,13 +30,32 @@
#include <asm/mpspec.h>

/* Mappings between logical cpu number and node number */
-extern u16 cpu_to_node_map[];
+DECLARE_PER_CPU(u16, x86_cpu_to_node_map);
+extern u16 __initdata x86_cpu_to_node_map_init[];
+extern void *x86_cpu_to_node_map_early_ptr;
extern cpumask_t node_to_cpumask_map[];

+#define NUMA_NO_NODE ((u16)(~0))
+
/* Returns the number of the node containing CPU 'cpu' */
+static inline int early_cpu_to_node(int cpu)
+{
+ u16 *cpu_to_node_map = x86_cpu_to_node_map_early_ptr;
+
+ if (cpu_to_node_map)
+ return cpu_to_node_map[cpu];
+ else if(per_cpu_offset(cpu))
+ return per_cpu(x86_cpu_to_node_map, cpu);
+ else
+ return NUMA_NO_NODE;
+}
+
static inline int cpu_to_node(int cpu)
{
- return cpu_to_node_map[cpu];
+ if(per_cpu_offset(cpu))
+ return per_cpu(x86_cpu_to_node_map, cpu);
+ else
+ return NUMA_NO_NODE;
}

/*
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1783,7 +1783,7 @@ EXPORT_SYMBOL(free_pages);
static unsigned int nr_free_zone_pages(int offset)
{
/* Just pick one node, since fallback list is circular */
- pg_data_t *pgdat = NODE_DATA(numa_node_id());
+ pg_data_t *pgdat = NODE_DATA(cpu_to_node(raw_smp_processor_id()));
unsigned int sum = 0;

struct zonelist *zonelist = pgdat->node_zonelists + offset;
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -18,6 +18,7 @@
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/module.h>
+#include <linux/sched.h>

#include <linux/sunrpc/types.h>
#include <linux/sunrpc/xdr.h>

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