9-STABLE, ZFS, NFS, ggatec - suspected memory leak

[Daniel Braniss]

> ----Security_Multipart(Fri_Apr_27_13_35_56_2012_748)--
> Content-Type: Text/Plain; charset=us-ascii
> Content-Transfer-Encoding: 7bit
> 
> Rick Macklem <rmacklem at uoguelph.ca> wrote
>   in <1527622626.3418715.1335445225510.JavaMail.root at erie.cs.uoguelph.ca>:
> 
> rm> Steven Hartland wrote:
> rm> > ---- Original Message -----
> rm> > From: "Rick Macklem" <rmacklem at uoguelph.ca>
> rm> > > At a glance, it looks to me like 8.x is affected. Note that the
> rm> > > bug only affects the new NFS server (the experimental one for 8.x)
> rm> > > when exporting ZFS volumes. (UFS exported volumes don't leak)
> rm> > >
> rm> > > If you are running a server that might be affected, just:
> rm> > > # vmstat -z | fgrep -i namei
> rm> > > on the server and see if the 3rd number shown is increasing.
> rm> >
> rm> > Many thanks Rick wasnt aware we had anything experimental enabled
> rm> > but I think that would be a yes looking at these number:-
> rm> >
> rm> > vmstat -z | fgrep -i namei
> rm> > NAMEI: 1024, 0, 1, 1483, 25285086096, 0
> rm> > vmstat -z | fgrep -i namei
> rm> > NAMEI: 1024, 0, 0, 1484, 25285945725, 0
> rm> >
> rm>                   ^
> rm> I don't think so, since the 3rd number (USED) is 0 here.
> rm> If that # is increasing over time, you have the leak. You are
> rm> probably running the old (default in 8.x) NFS server.
> 
>  Just a report, I confirmed it affected 8.x servers running newnfs.
> 
>  Actually I have been suffered from memory starvation symptom on that
>  server (24GB RAM) for a long time and watching vmstat -z
>  periodically.  It stopped working once a week.  I investigated the
>  vmstat log again and found the amount of NAMEI leak was 11,543,956
>  (about 11GB!) just before the locked-up.  After applying the patch,
>  the leak disappeared.  Thank you for fixing it!
> 
> -- Hiroki
this is on 8.2-STABLE/amd64 from around August:
same here, this zfs+newnfs has been hanging every few months, and I can see
now the leak, it's slowly increasing:
NAMEI:                   1024,        0,   122975,      529, 15417248,        0
NAMEI:                   1024,        0,   122984,      520, 15421772,        0
NAMEI:                   1024,        0,   123002,      502, 15424743,        0
NAMEI:                   1024,        0,   123008,      496, 15425464,        0

cheers,
	danny