On Fri, Jan 29, 2010 at 03:23:21PM -0500, David Daney wrote: ... > > To follow up on this - does Octeon have a fixed VM size limit ? > > Yes. But it is larger than SB1's 44 bits. For Octeon it is 49 bits. > > > > And when you run your tests with larger page sizes, do you have IPV6 enabled ? > > Yes. > > But at 16K pages the VM size is 47 bits, so it is under the limit. > > At 64K pages I am using 2-level page tables for 42 bits of VM space > which is again under the limit. > > On SB1 and 3-level tables, you will always exceed the limit for both 16K > (47 bits) and 64K (55 bits) page sizes. > Ok, based on this info I'll send out a proposed patch shortly. Guenter
