(2012/05/12 6:19), Andrew Morton wrote: > On Fri, 11 May 2012 18:47:06 +0900 > KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> wrote: > >> From: Frederic Weisbecker <fweisbec@xxxxxxxxx> >> >> At killing res_counter which is a child of other counter, >> we need to do >> res_counter_uncharge(child, xxx) >> res_counter_charge(parent, xxx) >> >> This is not atomic and wasting cpu. This patch adds >> res_counter_uncharge_until(). This function's uncharge propagates >> to ancestors until specified res_counter. >> >> res_counter_uncharge_until(child, parent, xxx) >> >> Now, ops is atomic and efficient. >> >> Changelog since v2 >> - removed unnecessary lines. >> - Fixed 'From' , this patch comes from his series. Please signed-off-by if good. >> >> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> > > Frederic's Signed-off-by: is unavaliable? > I didn't add his Signed-off because I modified his orignal patch a little... I dropped res_counter_charge_until() because it's not used in this series, I have no justification for adding it. The idea of res_counter_uncharge_until() is from his patch. Thanks, -Kame -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>