Messages in this thread | | | Date | Tue, 29 Mar 2011 12:44:45 -0400 | From | Vivek Goyal <> | Subject | Re: Blkio: Apply two policies on one IO process |
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On Wed, Mar 30, 2011 at 12:00:16AM +0800, Lina Lu wrote: > Hi Vivek, > As the weight and throttle policies are on different layers, someone can apply > these two policies on one IO pid at one time. And the IO bandwidth will be controlled > with the more stringent policy. > If someone first set two policies on one pid, then want to remove the weight > policy, he must first echo the pid to parent dir's tasks, then echo the throttle policy > to parent dir's blkio.throttle_xx_xx_device. These steps seen to be cumbersome. > This is because the weight policy can be applied independence, but the throttle > policy is always accompany with the weight policy(default 500). I think it will be > better that these policies are independent of each other. What is your opinion? > Additional, do you recommend applying two policies on one IO process?
How do you want to make these independent?
- If one does not want weight based policy, one can change IO scheduler to deadline.
- If one does not want throttling policy, do not apply throttling limits.
Thanks Vivek
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