Re: [PATCH V6 3/3] perf/x86/intel: Support PEBS counters snapshotting

[Peter Zijlstra]

On Wed, Dec 18, 2024 at 07:16:43AM -0800, kan.liang@xxxxxxxxxxxxxxx wrote:

> To prevent the case that a PEBS record value might be in the past
> relative to what is already in the event, perf always stops the PMU and
> drains the PEBS buffer before updating the corresponding event->count.

Like I wrote here:

  https://lkml.kernel.org/r/20241218082404.GI11133@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

I don't think this is sufficient.