Re: [patch v3]numa: add a sysctl to control interleave allocationgranularity from each node to improve I/O performance

[Andi Kleen]

> That's what I want to avoid letting each apps to explicitly do it, it's
> a lot of burden.

Usually apps that set NUMA policy can change it. Most don't anyways.
If it's just a script with numactl it's easily changed.

> That's true only workload with heavy I/O wants this. but I don't expect
> it will harm other workloads.

How do you know? 

> 
> >> Also I don't like having more per task state. Could you compute this
> >> from the address instead even for the process policy case?
> >
> >That sounds good.
> the process policy case doesn't give an address for allocation.

That's true.

-Andi
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