On Sat, Feb 20, 2016 at 09:46:19PM +0530, Aneesh Kumar K.V wrote: > Paul Mackerras <pau...@samba.org> writes: > > > This frees up bits 57-63 in the Linux PTE on 64-bit Book 3S machines. > > In the 4k page case, this is done just by reducing the size of the > > RPN field to 39 bits, giving 51-bit real addresses. In the 64k page > > case, we had 10 unused bits in the middle of the PTE, so this moves > > the RPN field down 10 bits to make use of those unused bits. This > > means the RPN field is now 3 bits larger at 37 bits, giving 53-bit > > real addresses in the normal case, or 49-bit real addresses for the > > special 4k PFN case. > > > Is it ok to have different real address bits between 4k and 64k linux > config ?
Do you mean a different number of address bits, or a different location? In fact both were different before this patch anyway. Paul. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
