On Tue, 2016-02-23 at 14:56 +0530, Aneesh Kumar K.V wrote: > "Aneesh Kumar K.V" <aneesh.ku...@linux.vnet.ibm.com> writes: > > > Hello, > > > > This series mostly consisting of code movement. One new thing added in > > this series > > is to switch book3s 64 to 4 level page table. The changes are done to > > accomodate > > the upcoming new memory model in future powerpc chips. The details of the > > new > > MMU model can be found at > > > > http://ibm.biz/power-isa3 (Needs registration). I am including a summary > > of the changes below. > > > > ISA 3.0 adds support for the radix tree style of MMU with full > > virtualization and related control mechanisms that manage its > > coexistence with the HPT. Radix-using operating systems will > > manage their own translation tables instead of relying on hcalls. > > > > Radix style MMU model requires us to do a 4 level page table > > with 64K and 4K page size. The table index size different page size > > is listed below > > > > PGD -> 13 bits > > PUD -> 9 (1G hugepage) > > PMD -> 9 (2M huge page) > > PTE -> 5 (for 64k), 9 (for 4k) > > > > We also require the page table to be in big endian format. > > > > Changes from V3: > > * rebase on top of PTE bits movement patch series > > * Drop all the hash linux abstraction patches > > * Keep only 4 level table and other code movement patches. > > > > Changes from V2: > > * rebase to latest kernel > > * Update commit messages > > * address review comments > > > > Changes from V1: > > * move patches adding helpers to the next series > > > > > > NOTE: > > This is lightly tested. Right now 4K linux page size is what is being > > tested. Once that is done > > I will have to do 64K linux page size tests. > > > > Tested the below tests with 4K page size and 64K page size > * libhugetlbfs test > * ltp mm tests > * kernel build in loop (testing thp collapse and split)
I did some basic tests on book3e (32 and 64 bit) and didn't see any problems with this version of the patchset. -Scott _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
