On Tue, 19 Oct 2010 17:45:08 -0700 Greg Thelen <gthelen@xxxxxxxxxx> wrote: > KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> writes: > > BTW, how about supporing dirty_limit_in_bytes when use_hierarchy=0 or > > leave it as broken when use_hierarchy=1 ? It seems we can only > > support dirty_ratio when hierarchy is used. > > I am not sure what you mean here. When using dirty_ratio, we can check the value of dirty_ratio at setting it and make guarantee that any children's dirty_ratio cannot exceeds it parent's. If we guarantee that, we can keep dirty_ratio even under hierarchy. When it comes to dirty_limit_in_bytes, we never able to do such kind of controls. So, it will be broken and will do different behavior than dirty_ratio. So, not supporing dirty_bytes when use_hierarchy==1 for now sounds reasonable to me. Thanks, -Kame -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>