Re: [Lsf] Preliminary Agenda and Activities for LSF

Greg Thelen
2011-03-29T21:09:17Z

On Tue, Mar 29, 2011 at 1:35 PM, Jan Kara <jack@suse.cz> wrote:
> On Tue 29-03-11 15:09:21, Vivek Goyal wrote:
>> On Tue, Mar 29, 2011 at 10:35:13AM -0700, Chad Talbott wrote:
>> > I'd like to propose a discussion topic:
>> >
>> > IO-less Dirty Throttling Considered Harmful...
>> >
>>
>> I see that writeback has extended session at 10.00. I am assuming
>> IO less throttling will be discussed there. Is it possible to
>> discuss its effect on block cgroups there? I am not sure enough
>> time is there because it ties in memory cgroup also.
>>
>> Or there is a session at 12.30 "memcg dirty limits and writeback", it
>> can probably be discussed there too.
>  Yes, I'd like to have this discussion in this session if Greg agrees.

It's fine with me if the morning session considers IO-less dirty
throttling with block cgroup service differentiation, but defers memcg
aspects to 12:30.

> We've been discussing about how to combine IO-less throttling and memcg
> awareness of the writeback and Greg was designing some framework to do
> this... Greg?

My initial patches are between memcg and the current IO-full
throttling code. However, the framework ideally will also allow for
IO-less dirty throttling with memcg. I have not wrapped my head
around how this should work with block cgroup isolation. I am hoping
others can help out with the block aspects.
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