IO controller Mini-Summit 2009

Dhaval Giani dhaval at
Fri Sep 11 04:16:32 PDT 2009

On Wed, Aug 26, 2009 at 08:32:51PM +0900, Ryo Tsuruta wrote:
> Hi All,
> As I have notified before, The 1st Linux IO controller Mini-Summit
> will be held in Tokyo Japan on Oct 17 -- day before the 9th Linux
> kernel summit. So I would like to propose the following topics for 
> the mini-summit and discuss about them.
> - Multiple IO controller development projects
>   - There are two activities for the development of IO controller,
>     Vivek's io-controller and dm-ioband. Do we have to pick one of
>     them to put into the mainline? How to advance the development?
> - 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.
> - I/O tracking and charging policy
>   - Which process, a page-requesting process or a page-returning
>     process, should be charged for the I/O caused by page reclaim?
>     We should consider two cases where the IO flushes anonymous pages
>     and file mapped pages.
> I think this is a good opportunity to meet face-to-face to discuss
> about IO controller development. I would like to many developers to
> join this mini-summit. Please visit the following URL for more
> information about the mini-summit.
> If you would like to join the mini-summit, please e-mail to me or post
> on the wiki page, 
> (You need an account on to edit the wiki page.)
> All comments, questions, suggestions and anything else are appreciated.

Hi Ryo,

Would you be having a remote dial-in for folks who cannot attend in


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