Re: [dm-devel] [PATCH 0/2] dm-band: The I/O bandwidth controller: Overview

[yamamoto valinux co jp (YAMAMOTO Takashi)]

> Hi,
> 
> > On Wed, Jan 23, 2008 at 09:53:50PM +0900, Ryo Tsuruta wrote:
> > > Dm-band gives bandwidth to each job according to its weight, 
> > > which each job can set its own value to.
> > > At this time, a job is a group of processes with the same pid or pgrp or uid.
> > 
> > It seems to rely on 'current' to classify bios and doesn't do it until the map
> > function is called, possibly in a different process context, so it won't
> > always identify the original source of the I/O correctly:
> 
> Yes, this should be mentioned in the document with the current implementation
> as you pointed out.
> 
> By the way, I think once a memory controller of cgroup is introduced, it will
> help to track down which cgroup is the original source.

do you mean to make this a part of the memory subsystem?

YAMAMOTO Takashi