On Mon, 2015-11-23 at 15:52 +0530, Aneesh Kumar K.V wrote: > This patch series attempt to update book3s 64 linux page table format to > make it more flexible. Our current pte format is very restrictive and we > overload multiple pte bits. This is due to the non-availability of free bits > in pte_t. We use pte_t to track the validity of 4K subpages. This patch > series free up pte_t of 11 bits by moving 4K subpage tracking to the > lower half of PTE page. The pte format is updated such that we have a > better method for identifying a pte entry at pmd level. This will also enable > us to implement hugetlb migration(not yet done in this series). > > Before making the changes to the pte format, I am splitting the > pte header definition such that we now have the below layout for headers
This series actually completely removes the tracking of the subages, right ? IE, it also halves the memory footprint of page tables, doesn't it ? Cheers, Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
