sched,x86: Don't use cluster topology for x86 hybrid CPUs
For x86 hybrid CPUs like Alder Lake, the order of CPU selection should be based strictly on CPU priority. Don't include cluster topology for hybrid CPUs to avoid interference with such CPU selection order. On Alder Lake, the Atom CPU cluster has more capacity (4 Atom CPUs) vs Big core cluster (2 hyperthread CPUs). This could potentially bias CPU selection towards Atom over Big Core, when Big core CPU has higher priority. Fixes: 66558b73 ("sched: Add cluster scheduler level for x86") Suggested-by:Tim Chen <tim.c.chen@linux.intel.com> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by:
Tim Chen <tim.c.chen@linux.intel.com> Tested-by:
Ricardo Neri <ricardo.neri-calderon@linux.intel.com> Link: https://lkml.kernel.org/r/20211204091402.GM16608@worktop.programming.kicks-ass.net
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