On Tue, 02 Oct 2012 18:26:01 -0400 (EDT) David Miller <davem@xxxxxxxxxxxxx> wrote: > Here is a set of patches that add THP support for sparc64. > > A few of them are relatively minor portability issues I ran into. > Like the MIPS guys I hit the update_mmu_cache() typing issue so I have > a patch for that here. > > It is very likely that I need the ACCESSED bit handling fix the > ARM folks have been posting recently as well. > > On the sparc64 side the biggest issue was moving to only supporting > 4MB pages and then realigning the page tables so that the PMDs map 4MB > (instead of 8MB as they do now). > > The rest was just trial and error, running tests, and fixing bugs. > > A familiar test case that makes 5 million random accesses to a 1GB > memory area goes from 20 seconds down to 0.43 seconds with THP enabled > on my SPARC T4-2 box. Hardly worth bothering about ;) I had a shot at integrating all this onto the pending stuff in linux-next. "mm: Add and use update_mmu_cache_pmd() in transparent huge page code." needed minor massaging in huge_memory.c. But as Andrea mentioned, we ran aground on Gerald's http://ozlabs.org/~akpm/mmotm/broken-out/thp-remove-assumptions-on-pgtable_t-type.patch, part of the thp-for-s390 work. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>