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Date:      Thu, 24 Jan 2013 20:07:23 +0200
From:      Konstantin Belousov <kostikbel@gmail.com>
To:        Christian Gusenbauer <c47g@gmx.at>
Cc:        freebsd-fs@freebsd.org, freebsd-stable@freebsd.org
Subject:   Re: 9.1-stable crashes while copying data from a NFS mounted directory
Message-ID:  <20130124180723.GI2522@kib.kiev.ua>
In-Reply-To: <20130124180359.GH2522@kib.kiev.ua>
References:  <201301241805.57623.c47g@gmx.at> <20130124180359.GH2522@kib.kiev.ua>

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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!
> >=20
> > I'm using 9.1 stable svn revision 245605 and I get the panic below if I=
 execute the following commands (as single user):
> >=20
> > # swapon -a
> > # dumpon /dev/ada0s3b
> > # mount -u /
> > # ifconfig age0 inet 192.168.2.2 mtu 6144 up
> > # mount -t nfs -o rsize=3D32768 data:/multimedia /mnt
> > # cp /mnt/Movies/test/a.m2ts /tmp
> >=20
> > then the system panics almost immediately. I'll attach the stack trace.
> >=20
> > 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=20
> > stack frame #15) fails.
> >=20
> > Any clues?
> I tried a similar operation with the nfs mount of rsize=3D32768 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.
>=20
> Show the output of "p *(struct uio *)0xffffff81b2da95a0" in kgdb.

And the output of "p *(struct buf *)0xffffff816fabca20".

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