vnode 'leak' in 4.x ...

[Oleg V. Nauman]

On Sat, Oct 30, 2004 at 01:20:08PM -0300, Marc G. Fournier wrote:
> 
> A little while ago, I reported a suspicion that vnodes just weren't being 
> freed up on long running servers ... after 55days of uptime on one of my 
> servers, here is what I'm dealing with ...
> 
> 793 'samples' today (one every minute)
> 786 with vnlru in a vlrup state
> 
> I shutdown all of the VMs running on the large hard drive (the only place 
> unionfs is being used) and umount'd the drive ... there were some 
  ^^^^^^^^^^^^^^^^^^^^^
	http://www.FreeBSD.org/cgi/query-pr.cgi?pr=73094

> suggested back then that this might/should free everything back up again 
> ... but it didn't:
> 
> Oct 30 13:06:02 venus root: debug.numvnodes: 522265 - debug.freevnodes: 
> 57966 - debug.vnlru_nowhere: 209679 - vlruwt
> Oct 30 13:07:00 venus root: debug.numvnodes: 522265 - debug.freevnodes: 
> 57268 - debug.vnlru_nowhere: 209679 - vlruwt
> Oct 30 13:08:00 venus root: debug.numvnodes: 522265 - debug.freevnodes: 
> 52335 - debug.vnlru_nowhere: 209679 - vlruwt
> Oct 30 13:09:00 venus root: debug.numvnodes: 522265 - debug.freevnodes: 
> 50228 - debug.vnlru_nowhere: 209682 - vlrup
> Oct 30 13:10:01 venus root: debug.numvnodes: 522265 - debug.freevnodes: 
> 44407 - debug.vnlru_nowhere: 209690 - vlrup
> Oct 30 13:11:00 venus root: debug.numvnodes: 522265 - debug.freevnodes: 
> 35424 - debug.vnlru_nowhere: 209697 - vlrup
> Oct 30 13:12:02 venus root: debug.numvnodes: 522265 - debug.freevnodes: 
> 34626 - debug.vnlru_nowhere: 209708 - vlrup
> Oct 30 13:13:00 venus root: debug.numvnodes: 522265 - debug.freevnodes: 
> 29214 - debug.vnlru_nowhere: 209727 - vlrup
> Oct 30 13:14:00 venus root: debug.numvnodes: 522265 - debug.freevnodes: 
> 24414 - debug.vnlru_nowhere: 209746 - vlrup
> Oct 30 13:15:00 venus root: debug.numvnodes: 522265 - debug.freevnodes: 
> 26994 - debug.vnlru_nowhere: 209766 - vlrup
> 
> The 'vlruwt' states above are while I had everything shutdown ... the 
> vlrup's all started again after I mounted the drive and started to restart 
> the VMs themselves ...
> 
> I expect a high # of vnodes to be used ... that isn't the issue ... the 
> issue is that even getting rid of the major mount point, so that only /, 
> /tmp, /usr, /var are left up, the large # of vnodes that are in use on 
> that mount point aren't being freed by vnlru :(
> 
> I hate to reboot the server, but it looks like I've got no choice at this 
> point ... is there something else that I can do, in 50 days or so, to 
> provide more information?
> 
> Thanks ...
> 
> ----
> Marc G. Fournier           Hub.Org Networking Services (http://www.hub.org)
> Email: scrappy at hub.org           Yahoo!: yscrappy              ICQ: 7615664

-- 
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