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SubjectRe: [PATCH] cgroup: limit block I/O bandwidth
* Jens Axboe <> [2008-01-20 15:32:40]:

> On Sun, Jan 20 2008, Andrea Righi wrote:
> Your approach is totally flawed, imho. For instance, you don't want a
> process to be able to dirty memory at foo mb/sec but only actually
> write them out at bar mb/sec.
> The noop-iosched changes are also very buggy. The queue back pointer
> breaks reference counting and the task pointer storage assumes the task
> will also always be around. That's of course not the case.
> IOW, you are doing this at the wrong level.

Andrea, Some of the problems pointed out so far have been solved in
the IO controller from OpenVZ (cc'ing Pavel for inputs).

> What problem are you trying to solve?
> --
> Jens Axboe

Warm Regards,
Balbir Singh
Linux Technology Center

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