[PATCH v3 02/11] memcg: document cgroup dirty memory interfaces
kamezawa.hiroyu at jp.fujitsu.com
Tue Oct 19 21:06:54 PDT 2010
On Tue, 19 Oct 2010 17:45:08 -0700
Greg Thelen <gthelen at google.com> wrote:
> KAMEZAWA Hiroyuki <kamezawa.hiroyu at jp.fujitsu.com> 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
So, not supporing dirty_bytes when use_hierarchy==1 for now sounds reasonable to me.
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