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arm64: numa: separate out updates to percpu nodeid and NUMA node cpumap

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Currently numa_clear_node removes both cpu information from the NUMA
node cpumap as well as the NUMA node id from the cpu. Similarly
numa_store_cpu_info updates both percpu nodeid and NUMA cpumap.

However we need to retain the numa node id for the cpu and only remove
the cpu information from the numa node cpumap during CPU hotplug out.
The same can be extended for hotplugging in the CPU.

This patch separates out numa_{add,remove}_cpu from numa_clear_node and
numa_store_cpu_info.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Reviewed-by: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
Tested-by: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
Tested-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Sudeep Holla
2018-07-06 12:02:43 +01:00
committed by Will Deacon
parent 31b4603557
commit 97fd6016a7
3 changed files with 27 additions and 8 deletions
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2
arch/arm64/kernel/smp.c
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@@ -225,6 +225,7 @@ asmlinkage notrace void secondary_start_kernel(void)
notify_cpu_starting(cpu);
store_cpu_topology(cpu);
numa_add_cpu(cpu);
/*
* OK, now it's safe to let the boot CPU continue. Wait for
@@ -679,6 +680,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
this_cpu = smp_processor_id();
store_cpu_topology(this_cpu);
numa_store_cpu_info(this_cpu);
numa_add_cpu(this_cpu);
/*
* If UP is mandated by "nosmp" (which implies "maxcpus=0"), don't set