On Mon, Sep 03, 2018 at 04:56:32PM +0800, Daniel Drake wrote: > On Sat, Sep 1, 2018 at 3:12 AM, Bjorn Helgaas <helgaas@xxxxxxxxxx> wrote: > > If true, this sounds like some sort of erratum, so it would be good to > > get some input from Intel, and I cc'd a few Intel folks. > > Yes, it would be great to get their input. We have seen one similar issue with LPSS devices when BIOS assigns device BARs above 4G (which is not the case here) and it turned out to be misconfigured MTRR register or something like that. It may not be related at all but it could be worth a try to dump out MTRR registers of one of the affected systems and see if the memory areas are listed there (and if the attributes are somehow wrong if found).
