[dm-devel] Re: dm-ioband: Test results.
Ryo Tsuruta
ryov at valinux.co.jp
Thu Apr 16 12:56:30 UTC 2009
Hi Vivek,
> How does your ioband setup looks like. Have you created at least one more
> competing ioband device? Because I think only in that case you have got
> this ad-hoc logic of waiting for the group which has not finished the
> tokens yet and you will end up buffering the bio in a FIFO.
I created two ioband devices and ran the dd commands only on the first
device.
> Do let me know if you think there is something wrong with my
> configuration.
>From a quick look at your configuration, there seems to be no problem.
> Can you also send bio-cgroup patches which apply to 2.6.30-rc1 so that
> I can do testing for async writes.
I've just posted the patches to related mailing lists. Please try it.
> Why have you split the regular patch and bio-cgroup patch? Do you want
> to address only reads and sync writes?
For the first step, my goal is to merge dm-ioband into device-mapper,
and bio-cgroup is not necessary for all situations such as bandwidth
control on a per partition basis.
I'll also try to do more test and report you back.
Thank you for your help,
Ryo Tsuruta
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