(2012/05/12 2:44), Glauber Costa wrote: > From: Frederic Weisbecker <fweisbec@xxxxxxxxx> > > Moving a task from a cgroup to another may require to substract its > resource charge from the old cgroup and add it to the new one. > > For this to happen, the uncharge/charge propagation can just stop when we > reach the common ancestor for the two cgroups. Further the performance > reasons, we also want to avoid to temporarily overload the common > ancestors with a non-accurate resource counter usage if we charge first > the new cgroup and uncharge the old one thereafter. This is going to be a > requirement for the coming max number of task subsystem. > > To solve this, provide a pair of new API that can charge/uncharge a > resource counter until we reach a given ancestor. > > Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx> > Acked-by: Paul Menage <paul@xxxxxxxxxxxxxx> > Acked-by: Glauber Costa <glommer@xxxxxxxxxxxxx> > Cc: Li Zefan <lizf@xxxxxxxxxxxxxx> > Cc: Johannes Weiner <hannes@xxxxxxxxxxx> > Cc: Aditya Kali <adityakali@xxxxxxxxxx> > Cc: Oleg Nesterov <oleg@xxxxxxxxxx> > Cc: Kay Sievers <kay.sievers@xxxxxxxx> > Cc: Tim Hockin <thockin@xxxxxxxxxx> > Cc: Tejun Heo <htejun@xxxxxxxxx> > Acked-by: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx> > Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Where is this function called in this series ? 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>