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| author | Philipp Hachtmann <phacht@linux.vnet.ibm.com> | 2014-03-06 18:25:13 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-08-03 18:40:25 +0200 |
| commit | 3a368f742da13955bed4a2efed85ed7c1d826bcc (patch) | |
| tree | 399d0b43b174206b1bb6418619d013528d4b28d4 /arch/s390/kernel/topology.c | |
| parent | s390/mm: make arch_add_memory() NUMA aware (diff) | |
| download | linux-3a368f742da13955bed4a2efed85ed7c1d826bcc.tar.xz linux-3a368f742da13955bed4a2efed85ed7c1d826bcc.zip | |
s390/numa: add core infrastructure
Enable core NUMA support for s390 and add one simple default mode "plain"
that creates one single NUMA node.
This patch contains several changes from Michael Holzheu.
Signed-off-by: Philipp Hachtmann <phacht@linux.vnet.ibm.com>
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/topology.c')
| -rw-r--r-- | arch/s390/kernel/topology.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c index 5728c5bd44a8..0f5f8b09c903 100644 --- a/arch/s390/kernel/topology.c +++ b/arch/s390/kernel/topology.c @@ -18,7 +18,10 @@ #include <linux/cpu.h> #include <linux/smp.h> #include <linux/mm.h> +#include <linux/nodemask.h> +#include <linux/node.h> #include <asm/sysinfo.h> +#include <asm/numa.h> #define PTF_HORIZONTAL (0UL) #define PTF_VERTICAL (1UL) @@ -260,6 +263,7 @@ static void update_cpu_masks(void) } } spin_unlock_irqrestore(&topology_lock, flags); + numa_update_cpu_topology(); } void store_topology(struct sysinfo_15_1_x *info) @@ -274,21 +278,21 @@ int arch_update_cpu_topology(void) { struct sysinfo_15_1_x *info = tl_info; struct device *dev; - int cpu; + int cpu, rc = 0; - if (!MACHINE_HAS_TOPOLOGY) { - update_cpu_masks(); - topology_update_polarization_simple(); - return 0; + if (MACHINE_HAS_TOPOLOGY) { + rc = 1; + store_topology(info); + tl_to_masks(info); } - store_topology(info); - tl_to_masks(info); update_cpu_masks(); + if (!MACHINE_HAS_TOPOLOGY) + topology_update_polarization_simple(); for_each_online_cpu(cpu) { dev = get_cpu_device(cpu); kobject_uevent(&dev->kobj, KOBJ_CHANGE); } - return 1; + return rc; } static void topology_work_fn(struct work_struct *work) @@ -450,7 +454,6 @@ static struct sched_domain_topology_level s390_topology[] = { { cpu_thread_mask, cpu_smt_flags, SD_INIT_NAME(SMT) }, { cpu_coregroup_mask, cpu_core_flags, SD_INIT_NAME(MC) }, { cpu_book_mask, SD_INIT_NAME(BOOK) }, - { cpu_cpu_mask, SD_INIT_NAME(DIE) }, { NULL, }, }; |