On Sun, 2011-08-14 at 13:38 +0200, Rafał Miłecki wrote: > In any case we see it can happen firmware is using that 0x1000 for > indexing. Well yes, but that won't happen if we limit ourselves to 4KiB of ring. So continuing to use 4KiB and masking out the 'top' bit works too. -- dwmw2