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SubjectRe: [RFC v5 09/11] mm: Try spin lock in speculative path
On Thu, Jul 06, 2017 at 05:29:26PM +0200, Laurent Dufour wrote:
> Based on the benchmarks I run, it doesn't fail so much often, but I was
> thinking about adding some counters here. The system is accounting for
> major page faults and minor ones, respectively current->maj_flt and
> current->min_flt. I was wondering if an additional type like async_flt will
> be welcome or if there is another smarter way to get that metric.
>
> Feel free to advise.

You could stick a tracepoint in, or extend PERF_COUNT_SW_PAGE_FAULTS*.

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