On 13/07/2022 14:33, Sudeep Holla wrote:

Hi Conor,

Ionela reported an issue with the CPU hotplug and as a fix I need to
move the call to detect_cache_attributes() which I had thought to keep
it there from first but for no reason had moved it to init_cpu_topology().

Wonder if this fixes the -ENOMEM on RISC-V as this one is called on the
cpu in the secondary CPUs init path while init_cpu_topology executed
detect_cache_attributes() for all possible CPUs much earlier. I think
this might help as the percpu memory might be initialised in this case.

Anyways give this a try, also test the CPU hotplug and check if nothing
is broken on RISC-V. We noticed this bug only on one platform while

Coll, will give it a go tomorrow probably. I have a swiotlb issue that's
broken my boot to find first :/

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