On Fri, 27 Jun 2008 00:36:46 +0200
Andrea Righi <righi.andrea@xxxxxxxxx> wrote:
Does all this code treat /dev/sda1 as a separate device from /dev/sda2?Yes, all the partitions are treated as separate devices with
If so, that would be broken.
(potentially) different limiting rules, but I don't understand why it
would be broken... dev_t has both minor and major numbers, so it would
be possible to select single partitions as well.
Well it's functionally broken, isn't it? A physical disk has a fixed
IO bandwidth and when the administrator wants to partition that
bandwidth amongst control groups he will need to consider the entire
device when doing so?
I mean, the whole point of this feature and of control groups as a
whole is isolation. But /dev/sda1 and /dev/sda2 are very much _not_
isolated. Whereas /dev/sda and /dev/sdb are (to a large degree)
isolated.