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[PATCH] ppc64: Add NUMA cpu summary at boot 

We used to print a NUMA cpu summary at boot before the hotplug cpu code
was added. This has been useful for catching machine configuration as
well as firmware bugs in the past.

This patch restores that functionality. An example of the output is:

Node 0 CPUs: 0-7
Node 1 CPUs: 8-15

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Anton Blanchard 2005-12-13 06:56:47 +11:00 committed by Paul Mackerras
parent 2c066042ec
commit 4b703a2317
3 changed files with 43 additions and 3 deletions
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3
arch/powerpc/kernel/smp.c
View File

@ -31,6 +31,7 @@
#include <linux/sysdev.h>
#include <linux/cpu.h>
#include <linux/notifier.h>
#include <linux/topology.h>
#include <asm/ptrace.h>
#include <asm/atomic.h>
@ -568,6 +569,8 @@ void __init smp_cpus_done(unsigned int max_cpus)
smp_ops->setup_cpu(boot_cpuid);
set_cpus_allowed(current, old_mask);
dump_numa_cpu_topology();
}
#ifdef CONFIG_HOTPLUG_CPU

39
arch/powerpc/mm/numa.c
View File

@ -489,7 +489,41 @@ static void __init setup_nonnuma(void)
node_set_online(0);
}
static void __init dump_numa_topology(void)
void __init dump_numa_cpu_topology(void)
{
unsigned int node;
unsigned int cpu, count;
if (min_common_depth == -1 || !numa_enabled)
return;
for_each_online_node(node) {
printk(KERN_INFO "Node %d CPUs:", node);
count = 0;
/*
* If we used a CPU iterator here we would miss printing
* the holes in the cpumap.
*/
for (cpu = 0; cpu < NR_CPUS; cpu++) {
if (cpu_isset(cpu, numa_cpumask_lookup_table[node])) {
if (count == 0)
printk(" %u", cpu);
++count;
} else {
if (count > 1)
printk("-%u", cpu - 1);
count = 0;
}
}
if (count > 1)
printk("-%u", NR_CPUS - 1);
printk("\n");
}
}
static void __init dump_numa_memory_topology(void)
{
unsigned int node;
unsigned int count;
@ -521,7 +555,6 @@ static void __init dump_numa_topology(void)
printk("-0x%lx", i);
printk("\n");
}
return;
}
/*
@ -583,7 +616,7 @@ void __init do_init_bootmem(void)
if (parse_numa_properties())
setup_nonnuma();
else
dump_numa_topology();
dump_numa_memory_topology();
register_cpu_notifier(&ppc64_numa_nb);

4
include/asm-powerpc/topology.h
View File

@ -55,8 +55,12 @@ static inline int node_to_first_cpu(int node)
.nr_balance_failed = 0, \
}
extern void __init dump_numa_cpu_topology(void);
#else
static inline void dump_numa_cpu_topology(void) {}
#include <asm-generic/topology.h>
#endif /* CONFIG_NUMA */