Re: [RFC][PATCH 4/8] perf/x86: Remove PERF_X86_EVENT_COMMITTED

[Peter Zijlstra]

On Tue, Mar 19, 2019 at 10:00:18PM +0100, Peter Zijlstra wrote:
> On Tue, Mar 19, 2019 at 01:48:18PM -0700, Stephane Eranian wrote:
> > On Thu, Mar 14, 2019 at 6:11 AM Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> > 
> > > For x86_pmu_commit_txn(), cpuc->n_events is updated, but we can
> > > trivially compute the desired value with cpuc->n_txn -- the number of
> > > events added in this transaction.
> > >
> > I suggest you put this explanation in the code so that it is easier to
> > understand.
> 
> Right, I actually attempted writing that comment a few times but every
> time it became a mess. I'll try again, because you're quite right, this
> is a bit magical.

Ha! I found the comment, it's in patch 8 :-)