Commit 7f9545aa authored Jul 06, 2018 by Sudeep Holla Committed by Will Deacon Jul 06, 2018

arm64: smp: remove cpu and numa topology information when hotplugging out CPU

We already repopulate the information on CPU hotplug-in, so we can safely
remove the CPU topology and NUMA cpumap information during CPU hotplug
out operation. This will help to provide the correct cpumask for
scheduler domains.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.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>

parent 5ec8b591

arch/arm64/kernel/smp.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -279,6 +279,9 @@ int __cpu_disable(void)
		if (ret)
		return ret;

		remove_cpu_topology(cpu);
		numa_remove_cpu(cpu);

		/*
		* Take this CPU offline. Once we clear this, we can't return,
		* and we must not schedule until we're ready to give up the cpu.