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SubjectRe: REGRESSION: Performance regressions from switching anon_vma->lock to mutex

* Andrew Morton <> wrote:

> It could be that if more things move away from dedicated threads
> and into worker threads, we'll need to build a separate accounting
> system so we can see how much time worker threads are spending on a
> per-handler basis. Which means a new top-like tool, etc.

perf record -g will go a long way towards such a tool already - but i
think it would be useful to create a more top-alike view as well.



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