Messages in this thread | | | From | Andi Kleen <> | Subject | Re: [PATCH 3/3] resource: Introduce resource cache | Date | Thu, 20 Jun 2019 14:31:48 -0700 |
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Dan Williams <dan.j.williams@intel.com> writes: > > The underlying issue is that the x86-PAT implementation wants to > ensure that conflicting mappings are not set up for the same physical > address. This is mentioned in the developer manuals as problematic on > some cpus. Andi, is lookup_memtype() and track_pfn_insert() still > relevant?
There have been discussions about it in the past, and the right answer will likely differ for different CPUs: But so far the official answer for Intel CPUs is that these caching conflicts should be avoided.
So I guess the cache in the original email makes sense for now.
-Andi
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