Messages in this thread | | | From | Andi Kleen <> | Subject | Re: Word-at-a-time dcache name accesses | Date | Sat, 03 Mar 2012 08:12:42 -0800 |
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"H. Peter Anvin" <hpa@zytor.com> writes:
> On 03/02/2012 03:46 PM, Linus Torvalds wrote: >> >> Comments? >> > > My biggest concern is what happens when this happens to be at the end of > mapped kernel memory and we overrun the page?
A long time ago (AMD K7ish) we had hardware bugs to work around in this area. Overlapping into some PCI hole MMIO areas could cause obscure hangs. That is why I was always careful to not do that in any x86 library code.
-Andi
-- ak@linux.intel.com -- Speaking for myself only
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