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| author | Akshay Adiga <akshay.adiga@linux.vnet.ibm.com> | 2018-05-16 15:02:14 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-05-28 11:46:33 +0300 |
| commit | ac9816dcbab53c57bcf1d7b15370b08f1e284318 (patch) | |
| tree | 6c3770a0db396ba9b743b913c55ca1c450368475 /usr | |
| parent | 458c70173daaaa823faeb5b4031bf8fa34c7ca16 (diff) | |
| download | linux-ac9816dcbab53c57bcf1d7b15370b08f1e284318.tar.xz | |
powerpc/powernv/cpuidle: Init all present cpus for deep states
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: 77b54e9f213f ("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>
Diffstat (limited to 'usr')
0 files changed, 0 insertions, 0 deletions