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Date:      Thu, 19 Nov 2009 19:08:25 +0100
From:      Michael Schaefer <utf128@googlemail.com>
To:        freebsd-questions@freebsd.org
Subject:   Re: rTorrent + FreeBSD + pf = freeze?
Message-ID:  <4B058999.20504@gmail.com>

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Hello everybody,

I encountered same problems and am kinda glad to see I'm not alone. I
use FreeBSD 7.1-RELEASE-p8 (GENERIC) on a VIA EPIA board (800MHz C3).
This box for the moment does nothing but torrent. I use two instances
of rtorrent. Each with an own user and in its own screen session.
Let's name them A and B. A seeds around 300 torrents and B around 500
(each rtorrent instance communicates just to one specific tracker).
The configuration is exactly the same, except B communicates with the
track only using https (A does plain http).
While A works 100% perfect an stable, B crashes the machine
reproducible. When using rtorrent 0.8.3/0.12.3 this happened only
about once a month. After upgrading to 0.8.4/0.12.4 the rate of
crashes increased to about once a week. now i upgraded to 0.8.5/0.12.5
and cannot even start instance B without crashing the machine
immediately just several minutes after I started it. Sometimes it
somehow "survives" the starting procedure (where actually all seeding
torrents are registered at the tracker at more or less the same time)
but then it takes about 10min - 2 hours after the hole systems crashes
again. Like I mentioned: instance B works perfectly without any
problems. I'm pretty sure I encountered the problem also (even not
the heavily) during times instance B was only seeding about 300
torrents...

For me the system simply reboots and doesn't freeze. The logs are
clear and show no advice concerning the problem.
It's not a matter of hardware since I changed the board (which
included CPU, RAM, NIC,...) and also the hard disc month ago. Also a
heat problem can be excluded.

Any clou about all that?
btw: I don't use PF at all...

regards - Michael


On Wed, 21 Oct 2009, cpghost wrote:
> 
> Hi,
> 
> could a resource leak or bug in pf(4) crash a RELENG_7 router (as of 
> Oct 6th)?
> 
> I'm experiencing frequent crashes on my soekris net4801 home router 
> for some months now, and I'm wondering if it could be some kind of 
> pf-related bug similar to this on OpenBSD:
> 
> http://www.mail-archive.com/misc@openbsd.org/msg58042.html
> 
> More precisely, when I fire up rtorrent-devel on some *other* machine
>  (not the router!), everything runs fine at first. It could also run 
> very fine for many days. BUT should I start a torrent with a large 
> number of seeders which could saturate my link for an extended period
>  of time, the soekris router would suddenly freeze... but not 
> immediately: more like a few hours (3 to 6) or so of relatively heavy
>  traffic. Only a hard reboot of the router would help. Please note 
> that rtorrent is NOT running on the router, only its traffic is being
>  redirected through the router.
> 
> So I'm suspecting some bug / resource leak in pf that would bring the
>  kernel down somehow. What kind of resources should I monitor (and 
> how)? Maybe that could bring some clues?
> 
> Oh, before anybody asks: I have no crashdumps, the router freezes 
> totally without panicking. And it doesn't recover automatically even
> after many hours.
> 
> Any ideas?
> 
> Thanks, -cpghost.




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