On Fri, 19 Oct 2012 10:10:16 +0100 Will Deacon <will.deacon@xxxxxxx> wrote: > 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 I received and then merged a patch which won't compile! Ho hum. I'll drop mm-thp-set-the-accessed-flag-for-old-pages-on-access-fault.patch and shall assume that you'll sort things out at the appropriate time. -- 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>