Messages in this thread | | | Date | Wed, 8 Jan 2014 00:34:50 +0100 | From | Andi Kleen <> | Subject | Re: [PATCH v0 04/71] itrace: Infrastructure for instruction flow tracing units |
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On Tue, Jan 07, 2014 at 09:51:45PM +0100, Peter Zijlstra wrote: > On Tue, Jan 07, 2014 at 04:42:55PM +0100, Andi Kleen wrote: > > > Yes; go read this: > > > > > > lkml.kernel.org/r/20131219125205.GT3694@twins.programming.kicks-ass.net > > > > Hmm, but AFAIK we're not using freeze counters on PMI today. > > We just rely on the explicit disabling in the counters through the global > > ctrl. > > > > So it should be the same as with any other PMI which also does not > > automatically freeze. Not true? > > Regardless whether its used or not; I'd very much like that answered.
The freeze always starts with the counter overflow, independent if the interrupt is blocked or not. So everything should be ok.
-Andi
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