Messages in this thread |  | | Date | Thu, 8 Jun 2017 22:00:41 +0200 | | From | Peter Zijlstra <> | | Subject | Re: [PATCH] x86, sched: allow topolgies where NUMA nodes share an LLC |
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On Thu, Jun 08, 2017 at 12:39:28PM -0700, Dave Hansen wrote: > > From: Dave Hansen <dave.hansen@linux.intel.com> > > Our SMP boot code has a series of assumptions about what NUMA > nodes are that are enforced via topology_sane(). Once upon a > time, we verified that a CPU package only contained a single node > (fixed in cebf15eb0). Today, we verify that SMT siblings and > LLCs do not span nodes. > > The SMT siblings assumption is safe, but the LLC is violated on > current hardware.
What does? That does sound broken. How can a cache domain sanely span memory controllers?
This needs far more explanation.
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