Messages in this thread | | | Date | Tue, 21 Apr 2009 10:16:17 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | Re: IO controller discussion (Was: Re: [PATCH 01/10] Documentation) |
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On Sun, 19 Apr 2009 17:53:59 +0200 Andrea Righi <righi.andrea@gmail.com> wrote: > > > > Got a question for you. Does memory controller already have the per cgroup > > dirty pages limit? If no, has this been discussed in the past? if yes, > > what was the conclsion? >
IMHO, dirty page handling and I/O throttling is a different problem.
- A task (or cgroup) which makes the page dirty and - A task (or cgroup) to which a page is accounted
Is different from each other, in general.
I have a plan to add dirty_ratio to memcg, but it's for avoiding massive stavation in memory reclaim, not for I/O control.
If you want to implement I/O throttle in MM layer, plz don't depend on memcg. The perpose is different.
Thanks, -Kame
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