Re: [RFC][PATCH 1/4] perf: core, add group schedulingtransactional APIs

[Peter Zijlstra]

On Thu, 2010-04-22 at 15:51 +0800, Lin Ming wrote:
> +       if (pmu->commit_txn) {
> +               ret = pmu->commit_txn(pmu);
> +               if (!ret) {
> +                       if (pmu->stop_txn)
> +                               pmu->stop_txn(pmu);
> +
> +                       return 0;
> +               }
> +       } 

I think we can mandate that if one of the _txn methods is available,
they all are, it would be weird otherwise.

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