* Toshi Kani <toshi.kani@xxxxxx> wrote: > The PAT bit gets relocated to bit 12 when PUD and PMD mappings are used. > This bit 12, however, is not covered by PTE_FLAGS_MASK, which is corrently > used for masking pfn and flags for all cases. > > Patch 1/4-2/4 make changes necessary for patch 3/4 to use P?D_PAGE_MASK. > > Patch 3/4 fixes pud/pmd interfaces to handle the PAT bit when PUD and PMD > mappings are used. > > Patch 3/4 fixes /sys/kernel/debug/kernel_page_tables to show the PAT bit > properly. > > Note, the PAT bit is first enabled in 4.2-rc1 with WT mappings. Are patches 1-3 only needed to fix /sys/kernel/debug/kernel_page_tables output, or are there other things fixed as well? The patches do not tell us any of that information ... Thanks, Ingo -- 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>