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SubjectRE: Linux 2.2.2pre4 SMP crash (wait_on_bh)
Date
We too run an AIC7xxx, and an EtherExpress Pro 100 .. Our system runs as
both a medium to high traffic web server, and mid traffic database server.
We had a crash once during a 'local' access to the database, which was a
couple of hours after a previous crash ('normal' crashes occur once every
5-6 days), but that may have been due to some remote access traffic ..

-Terry

> On Sat, 20 Feb 1999, Jordan Mendelson wrote:
>
> > Andrea Arcangeli wrote:
> > >
> > > On Sat, 20 Feb 1999, Terry Katz wrote:
> > >
> > > >I've experienced the same problem... 2.2.1, and 2.2.2pre2...
> There have been
> > > >a number of people who have brought this up... No one has really been
> > > >helpful in an answer as to how to fix. Linus suggested
> 2.2.2pre2 to me a
> > > >short time ago, but just recently it happened with that so ...
> > >
> > > Are you using the shaper. The shaper had a SMP race that could cause
> > > exactly this kind of SMP hang. I just fixed it and you can
> find my fix in
> > > both linux-kernel and linux-net.
> >
> > No traffic shaper here.. my current running config is:
>
> No shaper here, either. Because I noticed that the traces seem to be the
> same and each has tcp_v4_hash(), and because I noticed that a machine we
> have here with identical hardware that has less net traffic hasn't ever
> had the problem, I ran some tests with multiple processes connecting and
> closing thousands of TCP sockets simultaneously on my SMP celeron box at
> home. It's been going for an hour or so now, and I haven't been able to
> reproduce anything.
>
> I noticed you are using a buslogic SCSI controller -- the machine that is
> having problems here is using an AIC7xxx, so perhaps the low level driver
> isn't the problem. What Ethernet card are you using? I noticed
> "EEPRO100" in your conf, which is what we are using here.
>
> Are you running a lot of net traffic through the machine? This machine
> that has had the problem 4 times in the last month or so sends ands
> receives about 500,000 packets per hour. It sends and receives mail,
> handles POP3 clients, runs a big nameserver, and has a few people logged
> in occasionally to read mail.
>
> Hmm...*ponder* I was testing sockets locally. Perhaps it has to go over
> the NIC...
>
> Simon-
>
> | Simon Kirby | Systems Administration |
> | mailto:sim@netnation.com | NetNation Communications |
> | http://www.netnation.com/ | Tech: (604) 684-6892 |
>
>


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