> -----Original Message----- > From: ext KOSAKI Motohiro [mailto:kosaki.motohiro@xxxxxxxxx] > Sent: 08 June, 2012 10:33 > To: Moiseichuk Leonid (Nokia-MP/Espoo) .. > Wrong. CPU don't realized the running code belong to userspace or kernel. > Every code just consume a power. That's why polling timer is wrong from > point of power consumption view. ??? We are talking about different things. User-space code could be dropped, distributed between several applications and has not deferred timers support. For polling API the user-space code has to be executed quite often. Localizing this code in kernel additionally allows to avoid vmsat/meminfo generation and parsing overhead as well. -- 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