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

[Andi Kleen]

On Tue, Dec 13, 2011 at 02:12:58PM -0600, Christoph Lameter wrote:
> On Tue, 13 Dec 2011, Andi Kleen wrote:
> 
> > I would prefer to add a new policy (INTERLEAVE_MULTI or so) for this
> > instead of a global sysctl, that takes the additional parameter.
> 
> That would require a change of all scripts and code that uses
> MPOL_INTERLEAVE. Lets not do that.

Yes, but setting a sysctl would need the same right?

It's not clear that all workloads want this.

With a global switch only you cannot set it case by case.

-Andi
-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only
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