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From: Dan Nelson <dnelson_1901@yahoo.com>
Date: Wed, 13 Sep 2017 10:56:55 -0500
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Subject: Re: Unusually high "Wired" memory
To: Borja Marcos <borjam@sarenet.es>
Cc: FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org>
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2017-09-12 1:27 GMT-05:00 Borja Marcos <borjam@sarenet.es>:
>
>
> > On 11 Sep 2017, at 11:25, Borja Marcos <borjam@sarenet.es> wrote:
> >
> >> Since I=E2=80=99ve updated a machine to 11.1-STABLE I am seeing a rath=
er unusual growth of Wired memory.
> >>
> >> Any hints on what might have changed from 11-RELEASE to 11.1-RELEASE a=
nd 11.1-STABLE?
>
> vmstat -z and vmstat -m follow
>
> % vmstat -z
> ITEM                   SIZE  LIMIT     USED     FREE      REQ FAIL SLEEP
> [...]
> g_bio:                  376,      0,15235172,     248,477839025,   0,   0
> [...]


I think this is the problem - you're leaking g_bio objects (5.7 GB
currently allocated if you multiply SIZE*USED).  I'm seeing the same
thing and it looks like it started after the recent ZFS merges from
-current.  I have filed a bugreport with some more info (
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D222288 ).