Re: [PATCH 4/4] mm: Increase SWAP_CLUSTER_MAX to batch TLB flushes

[Andrew Morton]

On Thu, 9 Jul 2015 09:14:25 +0100 Mel Gorman <mgorman@xxxxxxx> wrote:

> Overall, I would say that none of these workloads justify the patch on
> its own. Reducing IPIs further is nice but we got the bulk of the
> benefit from the two batching patches and after that other factors
> dominate. Based on the results I have, I'd be ok with the patch being
> dropped. It can be reconsidered for evaluation if someone complains
> about excessive IPIs again on reclaim intensive workloads.

OK, thanks.  The benefit is small and there is some risk of
unanticipated problems.  I think I'll park the patch in -mm for now and
will wait to see if something happens.

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