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IO controller Mini-Summit 2009

From xen-devel mailing list:

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.
http://apps.sourceforge.net/trac/ioband/wiki/iosummit

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 SourceForge.net to edit the wiki page.)

All comments, questions, suggestions and anything else are appreciated.

Thanks,
Ryo Tsuruta


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