Re: [PATCH v3] sched/topology: Enable topology_span_sane check only for debug builds

Peter Zijlstra
2025-02-05T09:55:18Z

On Wed, Feb 05, 2025 at 03:18:24PM +0530, K Prateek Nayak wrote:

> Have there been any reports on an x86 system / VM where
> topology_span_sane() was tripped?

At the very least Intel SNC 'feature' tripped it at some point. They
figured it made sense to have the LLC span two nodes.

But I think there were some really dodgy VMs too.

But yeah, its not been often. But basically dodgy BIOS/VM data can mess
up things badly enough for it to trip.