[PVE-User] Kernel Memory Leak on PVE6?

[Chris Hofstaedtler | Deduktiva]

Replying to myself once more, mostly for the benefit of people
following along at home...

* Chris Hofstaedtler | Deduktiva <chris.hofstaedtler at deduktiva.com> [191002 00:07]:
> > root at vn03:~# uname -a
> > Linux vn03 5.0.21-1-pve #1 SMP PVE 5.0.21-1 (Tue, 20 Aug 2019 17:16:32 +0200) x86_64 GNU/Linux
> 
> I've upgraded both machines yesterday to:
> Linux vn03 5.0.21-2-pve #1 SMP PVE 5.0.21-6 (Fri, 27 Sep 2019 17:17:02 +0200) x86_64 GNU/Linux
> 
> And they seem to be doing fine for now. Also, the slab size is a lot
> smaller just after boot, compared to previous reboots.

So, that helped, but it's not the entire story.

For anyone affected:
  - Do you have ipmitool, libfreeipmi17, freeipmi-common installed?
  - Are you running check_mk agent or another tool polling ipmitool
    data?
  - Can you try uninstalling ipmitool libfreeipmi17 freeipmi-common
    to see if the problem goes away?

Plus, if you happen to have check_mk and can't see details in your
memory allocation graphs, you can add an extra "slab only" graph
by editing:
  /opt/omd/versions/1.5.0p22.cre/share/check_mk/pnp-templates/check_mk-mem.linux.php
and adding:
   $opt[] = $defopt . "--title \"Slab only\"";
   $def[] = ""
           . mem_area("slab",         "af91eb", "Slab (Various smaller caches)",        FALSE)
           ;
starting at line 95.

Chris

-- 
Chris Hofstaedtler / Deduktiva GmbH (FN 418592 b, HG Wien)
www.deduktiva.com / +43 1 353 1707