diff options
| author | Nishanth Aravamudan <nacc@linux.vnet.ibm.com> | 2014-05-19 11:14:23 -0700 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-05-28 13:35:33 +1000 |
| commit | 8c272261194dfda11cc046fbe808e052f6f284eb (patch) | |
| tree | 468cda65465b0f02bb1b0bf332a5bc3e8cb16538 | |
| parent | 86969cf7330a53c93edfd1bf2c28ad053e289162 (diff) | |
powerpc/numa: Enable USE_PERCPU_NUMA_NODE_ID
Based off 3bccd996 for ia64, convert powerpc to use the generic per-CPU
topology tracking, specifically:
initialize per cpu numa_node entry in start_secondary
remove the powerpc cpu_to_node()
define CONFIG_USE_PERCPU_NUMA_NODE_ID if NUMA
Signed-off-by: Nishanth Aravamudan <nacc@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/Kconfig | 4 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/topology.h | 13 | ||||
| -rw-r--r-- | arch/powerpc/kernel/smp.c | 6 |
3 files changed, 10 insertions, 13 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index e0998997943..9125964af40 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -453,6 +453,10 @@ config NODES_SHIFT default "4" depends on NEED_MULTIPLE_NODES +config USE_PERCPU_NUMA_NODE_ID + def_bool y + depends on NUMA + config ARCH_SELECT_MEMORY_MODEL def_bool y depends on PPC64 diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h index c9202151079..5ecf7ea52ad 100644 --- a/arch/powerpc/include/asm/topology.h +++ b/arch/powerpc/include/asm/topology.h @@ -20,19 +20,6 @@ struct device_node; #include <asm/mmzone.h> -static inline int cpu_to_node(int cpu) -{ - int nid; - - nid = numa_cpu_lookup_table[cpu]; - - /* - * During early boot, the numa-cpu lookup table might not have been - * setup for all CPUs yet. In such cases, default to node 0. - */ - return (nid < 0) ? 0 : nid; -} - #define parent_node(node) (node) #define cpumask_of_node(node) ((node) == -1 ? \ diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index e2a4232c587..d7252adea75 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -390,6 +390,7 @@ void smp_prepare_boot_cpu(void) #ifdef CONFIG_PPC64 paca[boot_cpuid].__current = current; #endif + set_numa_node(numa_cpu_lookup_table[boot_cpuid]); current_set[boot_cpuid] = task_thread_info(current); } @@ -750,6 +751,11 @@ void start_secondary(void *unused) } traverse_core_siblings(cpu, true); + /* + * numa_node_id() works after this. + */ + set_numa_node(numa_cpu_lookup_table[cpu]); + smp_wmb(); notify_cpu_starting(cpu); set_cpu_online(cpu, true); |