re: port-amd64/52679: amd64 pmap page leak?

[Paul Goyette <paul%whooppee.com@localhost>]

On Sat, 4 Nov 2017, Paul Goyette wrote:

> > >  On my amd64 8.99.3 system (with 128GB RAM), my discrepancy is > 8%
> > >
> > >        4096 bytes per page
> > >           8 page colors
> > >    32572896 pages managed
> > >    20457781 pages free
> > >     9365903 pages active
> > >       34169 pages inactive
> > >           0 pages paging
> > >       19572 pages wired
> > >    12383934 zero pages
> > > free+active+inactive+paging+wired = 29,877,425, which is only 91.7%
> > > of managed pages...

That leaves a "missing" count of 2,695,471 ...

> vmstat -m reported 9GB, which is more than what's missing above.

The actual number from vmstat is

In use 9740352K, total allocated 9939724K; utilization 98.0%

That 9.9GB of pool from vmstat -m translates to about 2,426,690 pages, 
which is _very_close_ to missing 2,695,471 million pages!



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