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From: Bill Pringlemeir <bpringlemeir@nbsps.com>
To: "Wiedemer, Thorsten (Lawo AG)" <Thorsten.Wiedemer@lawo.com>
Subject: Re: AW: UBI leb_write_unlock NULL pointer Oops (continuation)
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Date: Thu, 06 Feb 2014 11:00:36 -0500
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 (Thorsten Wiedemer's message of "Thu, 6 Feb 2014 14:05:40 +0100")
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> On  5 Feb 2014, richard@nod.at wrote:

>> I think the issue is not related to fastmap because we have reports
>> for kernels older than 3.7.  Fastmap got merged in 3.7.

> ________________________________________
> Von: Bill Pringlemeir [bpringlemeir@nbsps.com]
> Gesendet: Mittwoch, 5. Februar 2014 23:23

> Yes, of course.  I meant fastmap may prevent the issue from happening.
> So, I wondered about Thorsten's configuration.

On  6 Feb 2014, Thorsten.Wiedemer@lawo.com wrote:

> we run on a 3.6.11 kernel, so no fastmap.
>
> grep -E 'MTD|UBI' .config | grep -v '^#'   gives

mxc_nand has 52689931 interrupts and several bit flips and I didn't have
a crash over night.  I think that 'kmemleak' and/or fast map changes the
behaviour (or maybe some other option).  I will retry with options
closer to yours.

Fwiw,
Bill Pringlemeir.