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From: Christian Gusenbauer <c47g@gmx.at>
To: Konstantin Belousov <kostikbel@gmail.com>
Subject: Re: 9.1-stable crashes while copying data from a NFS mounted directory
Date: Thu, 24 Jan 2013 19:50:49 +0100
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On Thursday 24 January 2013 19:07:23 Konstantin Belousov wrote:
> On Thu, Jan 24, 2013 at 08:03:59PM +0200, Konstantin Belousov wrote:
> > On Thu, Jan 24, 2013 at 06:05:57PM +0100, Christian Gusenbauer wrote:
> > > Hi!
> > > 
> > > I'm using 9.1 stable svn revision 245605 and I get the panic below if I
> > > execute the following commands (as single user):
> > > 
> > > # swapon -a
> > > # dumpon /dev/ada0s3b
> > > # mount -u /
> > > # ifconfig age0 inet 192.168.2.2 mtu 6144 up
> > > # mount -t nfs -o rsize=32768 data:/multimedia /mnt
> > > # cp /mnt/Movies/test/a.m2ts /tmp
> > > 
> > > then the system panics almost immediately. I'll attach the stack trace.
> > > 
> > > Note, that I'm using jumbo frames (6144 byte) on a 1Gbit network, maybe
> > > that's the cause for the panic, because the bcopy (see stack frame
> > > #15) fails.
> > > 
> > > Any clues?
> > 
> > I tried a similar operation with the nfs mount of rsize=32768 and mtu
> > 6144, but the machine runs HEAD and em instead of age. I was unable to
> > reproduce the panic on the copy of the 5GB file from nfs mount.

Hmmm, I did a quick test. If I do not change the MTU, so just configuring age0 
with

# ifconfig age0 inet 192.168.2.2 up

then I can copy all files from the mounted directory without any problems, 
too. So it's probably age0 related?

Ciao,
Christian.