Messages in this thread | | | Date | Thu, 21 Feb 2008 13:44:36 -0800 | From | "H. Peter Anvin" <> | Subject | Re: 2.6.25-rc1 xen pvops regression |
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Jeremy Fitzhardinge wrote: > H. Peter Anvin wrote: >>> Still curious about why a pagetable page is ending up in that range >>> though. Seems like it shouldn't be possible, since we shouldn't be >>> allowed to allocate from those pages, at least until the DMI probe >>> has happened... Unless the early allocator is only excluded from >>> e820 reserved pages, which would cause a problem on systems which >>> don't reserve the DMI space... HPA? >>> >> >> I thought the problem was a Xen-provided pagetable from before Linux >> started? > > Hm, I don't think so. The domain-builder pagetable is put after the > kernel, so it shouldn't be under 1M. >
That's weird, then. If we put a page table at 0xf0000, it would crash hard on real hardware (there is ROM there); as I mentioned, I do have hardware which both reserves and doesn't reserve this region.
-hpa
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