* H. Peter Anvin <hpa@xxxxxxxxx> wrote: > On 06/24/2013 12:39 PM, Ingo Molnar wrote: > > > > That might be a bit too granular: if we hit such an uninitialized block of > > memory we'd have to process 262,144 pages - potentially from an IRQ > > handler that does GFP_ATOMIC... or other latency critical code. > > > > With 2MB we'd have to on-demand initialize 512 pages, which shouldn't show > > up during normal use. > > > > No... you split the gigabyte page into 511 2M pages and 512 4K pages. Oh, double deferred initialization. That should solve the 32 exabyte problem as well I guess ;-) Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
