On Thu, Oct 18, 2012 at 11:05:02PM +0100, Andrew Morton wrote: > On Wed, 17 Oct 2012 16:54:02 +0100 > Will Deacon <will.deacon@xxxxxxx> wrote: > > > On x86 memory accesses to pages without the ACCESSED flag set result in the > > ACCESSED flag being set automatically. With the ARM architecture a page access > > fault is raised instead (and it will continue to be raised until the ACCESSED > > flag is set for the appropriate PTE/PMD). > > > > For normal memory pages, handle_pte_fault will call pte_mkyoung (effectively > > setting the ACCESSED flag). For transparent huge pages, pmd_mkyoung will only > > be called for a write fault. > > > > This patch ensures that faults on transparent hugepages which do not result > > in a CoW update the access flags for the faulting pmd. > > Confused. Where is the arm implementation of update_mmu_cache_pmd()? Right at the end of this patch, which was posted to the ARM list yesterday: http://lists.infradead.org/pipermail/linux-arm-kernel/2012-October/126387.html Cheers, Will -- 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>