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Re: [dm-devel] [PATCH 1/2] dm-kcopyd: introduce per-module throttle structure
- From: Joe Thornber <thornber redhat com>
- To: Mikulas Patocka <mpatocka redhat com>
- Cc: device-mapper development <dm-devel redhat com>, "Alasdair G. Kergon" <agk redhat com>
- Subject: Re: [dm-devel] [PATCH 1/2] dm-kcopyd: introduce per-module throttle structure
- Date: Fri, 10 Jun 2011 14:48:00 +0100
On Fri, Jun 10, 2011 at 09:41:50AM -0400, Mikulas Patocka wrote:
> This works if the data is directly on the partition, but it won't work on
> the device mapper (if MD is on the device mapper, it won't work too).
>
> The device mapper has no function to tell where the bio is finally
> remapped, so you can't read disk statistics for that particular disk.
ok, thx
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