powerpc/powernv/cpuidle: Init all present cpus for deep states

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Init all present cpus for deep states instead of "all possible" cpus.
Init fails if a possible cpu is guarded. Resulting in making only
non-deep states available for cpuidle/hotplug.

Stewart says, this means that for single threaded workloads, if you
guard out a CPU core you'll not get WoF (Workload Optimised
Frequency), which means that performance goes down when you wouldn't
expect it to.

Fixes: 77b54e9f21 ("powernv/powerpc: Add winkle support for offline cpus")
Cc: stable@vger.kernel.org # v3.19+
Signed-off-by: Akshay Adiga <akshay.adiga@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Akshay Adiga 2018-05-16 17:32:14 +05:30 • committed by Michael Ellerman

parent 458c70173d

commit ac9816dcba

1 changed files with 2 additions and 2 deletions

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arch/powerpc/platforms/powernv/idle.c

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