Re: [PATCH V2] arm64: add SCHED_CLUSTER's dependency on ACPI
From: Sudeep Holla
Date: Mon Apr 25 2022 - 06:07:37 EST
On Sun, Apr 24, 2022 at 07:55:01PM -0700, Qing Wang wrote:
> From: Wang Qing <wangqing@xxxxxxxx>
> cluster sched_domain configured by cpu_topology.cluster_sibling,
> which is set by cluster_id, cluster_id can only get from ACPI.
> If the system does not enable ACPI, cluster_id is always -1, even enable
> SCHED_CLUSTER is invalid, this is misleading.
> So we add SCHED_CLUSTER's dependency on ACPI here.
Any reason why this can't be extended to support DT based systems via
cpu-map in the device tree. IMO we almost have everything w.r.t topology
in DT and no reason to deviate this feature between ACPI and DT.