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xen-devel
[Xen-devel] Re: [dm-devel] [PATCH 0/2] dm-band: The I/O bandwidth contro
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To: |
taka@xxxxxxxxxxxxx |
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Subject: |
[Xen-devel] Re: [dm-devel] [PATCH 0/2] dm-band: The I/O bandwidth controller: Overview |
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From: |
yamamoto@xxxxxxxxxxxxx (YAMAMOTO Takashi) |
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Date: |
Thu, 24 Jan 2008 12:38:07 +0900 (JST) |
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xen-devel@xxxxxxxxxxxxxxxxxxx, containers@xxxxxxxxxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, dm-devel@xxxxxxxxxx, agk@xxxxxxxxxx |
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> 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
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