BeagleBone locked up

[Ian Lepore]

On Mon, 2013-02-11 at 19:06 -0500, Brett Wynkoop wrote:
> Greeting-
> 
> While building a kernel the Bone stopped responding on the net and this
> is what I found on the console:
> 
> ti_mmchs0: Error: current cmd NULL, already done?
> swap_pager: indefinite wait buffer: bufobj: 0, blkno: 5534, size: 8192
[...]
> ti_mmchs0: Error: current cmd NULL, already done?
> ifaddr cache = 0xc1fbd700  is deleted
> ti_mmchs0: Error: current cmd NULL, already done?
> ti_mmchs0: Error: current cmd NULL, already done?
> 
> The interesting thing is I have seen this same swap_pager error message
> on my 32 bit x86 FreeBSD 9 box when it drops it's IDE disks and goes
> off the net as well.
> 
> The last I saw of the kernel recompile it was at linking just before it
> locked up.
> 
> Ideas?

That's the second report recently of indefinite wait buffer.  What it
really means is that it has been waiting more than 20 seconds to pull a
page (or block of pages) in from swap.  That plus the cmd NULL errors
tend to point in the direction of the mmchs driver.

-- Ian