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Date:      Mon, 11 Feb 2013 22:38:38 -0800
From:      Tim Kientzle <tim@kientzle.com>
To:        Ian Lepore <ian@freebsd.org>
Cc:        freebsd-arm@freebsd.org, Brett Wynkoop <wynkoop@wynn.com>
Subject:   Re: BeagleBone locked up
Message-ID:  <4AF15BB9-4174-4564-A770-BF9EB9D447F5@kientzle.com>
In-Reply-To: <1360629932.4545.150.camel@revolution.hippie.lan>
References:  <20130210231709.26f122dc@ivory.local> <B4346DD4-BA90-4A2C-A2B3-D5DBB6B68942@kientzle.com> <20130211190606.1c985baf@ivory.local> <1360629932.4545.150.camel@revolution.hippie.lan>

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On Feb 11, 2013, at 4:45 PM, Ian Lepore wrote:

> 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.

This is something that's degraded fairly recently.
I only started seeing these in the last week or so.

And the BeagleBone MMCHS driver has not been
touched in a very long time.

Tim




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