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powerpc/pseries: Update NUMA VDSO information when updating CPU maps

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The following patch adds vdso_getcpu_init(), which stores the NUMA node for
a cpu in SPRG3:

Commit 18ad51dd34 ("powerpc: Add VDSO version of getcpu") adds
vdso_getcpu_init(), which stores the NUMA node for a cpu in SPRG3.

This patch ensures that this information is also updated when the NUMA
affinity of a cpu changes.

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Jesse Larrew 2013-04-24 06:03:48 +00:00 committed by Benjamin Herrenschmidt
parent 30c05350c3
commit 176bbf1424
1 changed files with 7 additions and 1 deletions
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8
arch/powerpc/mm/numa.c
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@ -30,6 +30,7 @@
#include <asm/paca.h>
#include <asm/hvcall.h>
#include <asm/setup.h>
#include <asm/vdso.h>
static int numa_enabled = 1;
@ -1434,6 +1435,7 @@ static int update_cpu_topology(void *data)
unregister_cpu_under_node(update->cpu, update->old_nid);
unmap_cpu_from_node(update->cpu);
map_cpu_to_node(update->cpu, update->new_nid);
vdso_getcpu_init();
register_cpu_under_node(update->cpu, update->new_nid);
}
@ -1449,6 +1451,7 @@ int arch_update_cpu_topology(void)
unsigned int cpu, changed = 0;
struct topology_update_data *updates, *ud;
unsigned int associativity[VPHN_ASSOC_BUFSIZE] = {0};
cpumask_t updated_cpus;
struct device *dev;
int weight, i = 0;
@ -1460,6 +1463,8 @@ int arch_update_cpu_topology(void)
if (!updates)
return 0;
cpumask_clear(&updated_cpus);
for_each_cpu(cpu, &cpu_associativity_changes_mask) {
ud = &updates[i++];
ud->cpu = cpu;
@ -1470,12 +1475,13 @@ int arch_update_cpu_topology(void)
ud->new_nid = first_online_node;
ud->old_nid = numa_cpu_lookup_table[cpu];
cpumask_set_cpu(cpu, &updated_cpus);
if (i < weight)
ud->next = &updates[i];
}
stop_machine(update_cpu_topology, &updates[0], cpu_online_mask);
stop_machine(update_cpu_topology, &updates[0], &updated_cpus);
for (ud = &updates[0]; ud; ud = ud->next) {
dev = get_cpu_device(ud->cpu);