Re: [PATCH v0 04/71] itrace: Infrastructure for instruction flow tracing units

[Alexander Shishkin]

Peter Zijlstra <peterz@xxxxxxxxxxxxx> writes:

> On Thu, Dec 19, 2013 at 12:57:59PM +0100, Peter Zijlstra wrote:
> So you're basically forced to stop the tracing on PMI anyhow; so your
> continuous tracing argument goes out the window.

It's only stopped inside the PMI handler to set up another buffer, and
is then started again, so no useful trace is lost. PMI handler is not
traced. What you're proposing is stopping it for good till perf collects
the previous data, which will lose us a lot of trace. So my argument
stands.

Regards,
--
Alex
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