lkml.org 
[lkml]   [2009]   [Oct]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: IO controller Mini-Summit 2009
Hi Vivek,

Thank you for CCing me.

I just wanted to let you know that Ted Tso was kind enough to let
us give a readout for the mini-summit at the kernel summit.

There will be other mini-summits sharing 50 minutes so we need to
keep each mini-summit readout to 5-6 minutes of presentation and
4-5 minutes of questions/discussions.

Yoshikawa-san and myself were planning to take notes of the
mini-summit, but it would be great if you could share yours. The
idea is to use those to prepare a brief mini-summit report (4-5
slides) that we can show at the kernel summit.

Later in the day, after the mini-summit, we would be sending a
draft version of the slides to the relevant mailing lists for you
to review. Since the mini-summit readouts will take place on
Monday I would appreciate it if you could comment on them before
Sunday night the latest.

Thanks,

Fernando

Vivek Goyal wrote:
> On Wed, Oct 14, 2009 at 09:24:44PM +0900, Ryo Tsuruta wrote:
>> Hello,
>>
>
> Hi Ryo,
>
> CCing people who are planning to attend the mini summit either in person
> or phone. (As per your list on io mini summit wiki page). Not sure if
> everybody is scanning mailing list for update on mini summit.
>
> I am checking out wiki page for more information like Venue. It says the
> venue is linux foundation office Japan. Hopefully there is no change in
> that information.
>
> What are the conference call details for the people who might want to join
> in over phone? Could not find those. Are you yet to post these?
>
> Thanks
> Vivek
>
>> I have summarized the topics for the IO controller mini-summit and
>> written the ideas seen in the mailing list.
>>
>> - The place where IO controller should be implemented
>> - Block layer in conjunction with the IO scheduler
>> - Common layer right above the IO scheduler
>> - CFQ enhancement.
>> - Both block and common layer, users can select whichever controller
>> they want.
>> - VFS layer
>>
>> - What kind of bandwidth control policies are needed?
>> - Proportional weight
>> - Enforcing upper limit
>> - Minimum bandwidth guarantee
>>
>> - How to handle buffered writes?
>> - Add dirt-ratio in the memory controller
>> - Add bufferred-write-cgroup to track buffered writebacks
>> - A per group per bdi pdflush threads
>>
>> - Who should be charged for swap activity?
>> - who requests a page.
>> - who has a page.
>> - All swap activities are charged to the root group.
>>
>> And I would also like to discuss about the followings.
>>
>> - Extensions of struct bio
>> - Make a bio point to the io_context of a process which creates the
>> I/O request. This allows to pass the IO scheduling class and
>> priority information to IO controller even if the IO is submitted
>> by another process which does not create the request, such as a
>> worker thread.
>> - Add a new flag to struct bio to identify the bio as urgent. This
>> gives IO controller a chance to handle the bio as high
>> priority. This flag should be set if the bio is created for the
>> page-out operation.
>>
>> - Common test methods to verify the functionality of IO controller.
>>
>> Please give me comments and suggestions. I may be missing or
>> misunderstanding something.
>>
>> Thanks,
>> Ryo Tsuruta
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>> Please read the FAQ at http://www.tux.org/lkml/



\
 
 \ /
  Last update: 2009-10-15 02:47    [W:0.078 / U:4.192 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site