On Mon, 12 May 2014, Jianyu Zhan wrote: > This means they guarantee that even they are preemted the vm > counter won't be modified incorrectly. Because the counter is page-related > (e.g., a new anon page added), and they are exclusively hold the pte lock. Ok. if these locations hold the pte lock then preemption is disabled and you are ok to use __mod_zone_page_state. Has nothing to do with the page. -- 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>