2010/9/13 Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx>: > * KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> [2010-09-13 16:08:22]: > >> >> I think this small race is not very critical but it's bug. >> We have this race since 2.6.34. >> = >> From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> >> >> Now. memory cgroup accounts file-mapped by counter and flag. >> counter is working in the same way with zone_stat but FileMapped flag only >> exists in memcg (for helping move_account). >> >> This flag can be updated wrongly in a case. Assume CPU0 and CPU1 >> and a thread mapping a page on CPU0, another thread unmapping it on CPU1