On 02/29/2016 09:34 AM, Robert Richter wrote:
On 22.02.16 17:58:22, David Daney wrote:
From: Ganapatrao Kulkarni <gkulkarni@xxxxxxxxxxxxxxxxxx>
Attempt to get the memory and CPU NUMA node via of_numa. If that
fails, default the dummy NUMA node and map all memory and CPUs to node
0.
Tested-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
Reviewed-by: Robert Richter <rrichter@xxxxxxxxxx>
Signed-off-by: Ganapatrao Kulkarni <gkulkarni@xxxxxxxxxxxxxxxxxx>
Signed-off-by: David Daney <david.daney@xxxxxxxxxx>
---
arch/arm64/Kconfig | 26 +++
arch/arm64/include/asm/mmzone.h | 12 ++
arch/arm64/include/asm/numa.h | 45 +++++
arch/arm64/include/asm/topology.h | 10 +
arch/arm64/kernel/pci.c | 10 +
arch/arm64/kernel/setup.c | 4 +
arch/arm64/kernel/smp.c | 4 +
arch/arm64/mm/Makefile | 1 +
arch/arm64/mm/init.c | 34 +++-
arch/arm64/mm/mmu.c | 1 +
arch/arm64/mm/numa.c | 403 ++++++++++++++++++++++++++++++++++++++
11 files changed, 545 insertions(+), 5 deletions(-)
create mode 100644 arch/arm64/include/asm/mmzone.h
create mode 100644 arch/arm64/include/asm/numa.h
create mode 100644 arch/arm64/mm/numa.c
+static int __init numa_init(int (*init_func)(void))
+{
+ int ret;
+
+ nodes_clear(numa_nodes_parsed);
+ nodes_clear(node_possible_map);
+ nodes_clear(node_online_map);
+ numa_free_distance();
^^^^^^^^^^^^^
Cleanup for any previous numa_alloc_distance()
+
+ ret = numa_alloc_distance();
+ if (ret < 0)
+ return ret;
If you move this before the remaining initializers, you will need to
clean this up on error.
Yes, we do this. See above.
So better move it back after
numa_register_nodes() as it was in v10. This should work since
distances are used not earlier than numa is enabled.
I moved it here for a reason.
The init_func (of_numa_init() in this case) makes callbacks that use the
numa_distance object. We need to allocate it before using it.
Allocating it after calling the init_func() is too late.
-Robert
+
+ ret = init_func();
+ if (ret < 0)
+ return ret;
+
+ if (nodes_empty(numa_nodes_parsed))
+ return -EINVAL;
+
+ ret = numa_register_nodes();
+ if (ret < 0)
+ return ret;
+
+ setup_node_to_cpumask_map();
+
+ /* init boot processor */
+ cpu_to_node_map[0] = 0;
+ map_cpu_to_node(0, 0);
+
+ return 0;
+}
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