On 03/03/2012 08:12 AM, Andi Kleen wrote: > "H. Peter Anvin" <hpa@xxxxxxxxx> 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. > We still map too much, though. That's a separate problems which should be fixed in its own right, though. -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
