[PATCH v2 0/7] perf, x86: large PEBS interrupt threshold

[Yan, Zheng]

This patch series implements large PEBS interrupt threshold. For some
limited cases, it can significantly reduce the sample overhead. Please
read patch 6's commit message for more information.

changes since v1:
  - drop patch 'perf, core: Add all PMUs to pmu_idr'
  - add comments for case that multiple counters overflow simultaneously

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