diff options
| author | Li Zhong <zhong@linux.vnet.ibm.com> | 2014-08-27 17:34:00 +0800 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2014-09-25 23:14:53 +1000 |
| commit | bc3c4327c92b9ceb9a6356ec64d1b2ab2dc851f9 (patch) | |
| tree | b2c70ae284ba74b239fc26fb716dc7016f7ad75b /arch/powerpc/kernel/smp.c | |
| parent | 70ad237515d99595ed03848bd8e549e50e83c4f2 (diff) | |
| download | linux-bc3c4327c92b9ceb9a6356ec64d1b2ab2dc851f9.tar.gz | |
powerpc: Only set numa node information for present cpus at boottime
As Nish suggested, it makes more sense to init the numa node informatiion
for present cpus at boottime, which could also avoid WARN_ON(1) in
numa_setup_cpu().
With this change, we also need to change the smp_prepare_cpus() to set up
numa information only on present cpus.
For those possible, but not present cpus, their numa information
will be set up after they are started, as the original code did before commit
2fabf084b6ad.
Cc: Nishanth Aravamudan <nacc@linux.vnet.ibm.com>
Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Acked-by: Nishanth Aravamudan <nacc@linux.vnet.ibm.com>
Tested-by: Cyril Bur <cyril.bur@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/smp.c')
| -rw-r--r-- | arch/powerpc/kernel/smp.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index 4866d5dbd420e1..71e186d5f331a3 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -380,8 +380,11 @@ void __init smp_prepare_cpus(unsigned int max_cpus) /* * numa_node_id() works after this. */ - set_cpu_numa_node(cpu, numa_cpu_lookup_table[cpu]); - set_cpu_numa_mem(cpu, local_memory_node(numa_cpu_lookup_table[cpu])); + if (cpu_present(cpu)) { + set_cpu_numa_node(cpu, numa_cpu_lookup_table[cpu]); + set_cpu_numa_mem(cpu, + local_memory_node(numa_cpu_lookup_table[cpu])); + } } cpumask_set_cpu(boot_cpuid, cpu_sibling_mask(boot_cpuid)); @@ -729,6 +732,9 @@ void start_secondary(void *unused) } traverse_core_siblings(cpu, true); + set_numa_node(numa_cpu_lookup_table[cpu]); + set_numa_mem(local_memory_node(numa_cpu_lookup_table[cpu])); + smp_wmb(); notify_cpu_starting(cpu); set_cpu_online(cpu, true); |