Re: kernel crashes inside MV643xx driver

[Satyam Sharma]

On Wed, 5 Sep 2007, Dale Farnsworth wrote:

> On Wed, Sep 05, 2007 at 08:24:52AM -0700, Andrew Morton wrote:
> > > On Mon, 20 Aug 2007 14:38:57 +0800 gshan <gshan@xxxxxxxxxxxxxxxxxx> wrote:
> > > Hi All,
> > > 
> > > After I started the NFS server, it crashed:
> > > 
> > > <3>Badness in local_bh_enable at 
> > > /home/cli4/sandbox/main/TelicaRoot/components/mvlinux/cge/devkit/lsp/7xx/linux/kernel/softirq.c:195
> > > Badness in local_bh_enable at 
> > > /home/cli4/sandbox/main/TelicaRoot/components/mvlinux/cge/devkit/lsp/7xx/linux/kernel/softirq.c:195
> > > Call trace:
> > >  [c0005340] check_bug_trap+0xbc/0x11c
> > >  [c0005604] ProgramCheckException+0x264/0x2bc
> > >  [c0004ac4] ret_from_except_full+0x0/0x4c
> > >  [c0022ae4] local_bh_enable+0x18/0x80
> > >  [c024648c] skb_copy_bits+0x168/0x3b8
> > >  [c024db44] __skb_linearize+0x90/0x150
> > >  [c020e8a4] mv643xx_eth_start_xmit+0x4c0/0x5bc
> > >  [c025c934] qdisc_restart+0xac/0x2bc
> > >  [c024de9c] dev_queue_xmit+0x298/0x34c
> > >  [c0269814] ip_finish_output+0x140/0x2b8
> > >  [c026a3ac] ip_fragment+0x3cc/0x6e0
> > >  [c026bac8] ip_push_pending_frames+0x3dc/0x46c
> > >  [c0289ec4] udp_push_pending_frames+0x10c/0x1cc
> > >  [c028a7c4] udp_sendpage+0x104/0x188
> > >  [c0292fc8] inet_sendpage+0x90/0xb8
> > > 
> > > I searched the webs and found the similar problems:

> > > http://www.mail-archive.com/netdev@xxxxxxxxxxxxxxx/msg05199.html

> > > http://oss.sgi.com/archives/netdev/2005-09/msg00025.html
> > > 
> > > Who knew there are fixes for the problem?
> > 
> > Well that got a tremendous response, didn't it?

I thought of replying to this post when I saw it couple weeks back, but
didn't because (1) that's an ancient kernel and (2) the first link that
was mentioned up there in the original post itself pointed to a patch to
solve it (which I verified was since applied to mainline too).


> > What do you mean by "crashed"?  The above is a warning and the system
> > should have survived.
> > 
> > Which kernel version is being used?
> 
> That is the key question.  From the pathnames, I suspect that gshan is
> using a MontaVista version.  I'm still (especially) interested, since
> MontaVista pays me.
> 
> BTW, I never received the original message on netdev or linux-kernel.
> Hmm.  Thanks to Andrew for replying.
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