On Fri, Jun 17, 2016 at 1:57 PM, Josh Poimboeuf <jpoimboe@xxxxxxxxxx> wrote: > On Fri, Jun 17, 2016 at 01:00:42PM -0700, Andy Lutomirski wrote: >> @@ -213,24 +232,46 @@ struct kmem_cache *vm_area_cachep; >> /* SLAB cache for mm_struct structures (tsk->mm) */ >> static struct kmem_cache *mm_cachep; >> >> -static void account_kernel_stack(struct thread_info *ti, int account) >> +static void account_kernel_stack(struct task_struct *tsk, int account) >> { >> - struct zone *zone = page_zone(virt_to_page(ti)); >> + struct zone *zone; >> + struct thread_info *ti = task_thread_info(tsk); >> + struct vm_struct *vm = task_stack_vm_area(tsk); >> + >> + BUILD_BUG_ON(IS_ENABLED(CONFIG_VMAP_STACK) && PAGE_SIZE % 1024 != 0); >> + >> + if (vm) { >> + int i; >> >> - mod_zone_page_state(zone, NR_KERNEL_STACK_KB, >> - THREAD_SIZE / 1024 * account); >> + BUG_ON(vm->nr_pages != THREAD_SIZE / PAGE_SIZE); >> >> - /* All stack pages belong to the same memcg. */ >> - memcg_kmem_update_page_stat( >> - virt_to_page(ti), MEMCG_KERNEL_STACK, >> - account * (THREAD_SIZE / PAGE_SIZE)); >> + for (i = 0; i < THREAD_SIZE / PAGE_SIZE; i++) { >> + mod_zone_page_state(page_zone(vm->pages[i]), >> + 1, PAGE_SIZE / 1024 * account); > > Shouldn't the second argument be NR_KERNEL_STACK_KB instead of 1? Indeed. Queued for v3. --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html