linux-kernel - Re: [PATCH 0/5] ubi: Fix bad PEBs reserve caclulation

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Date:	Sat, 7 Jul 2012 09:14:47 +0300
From:	Shmulik Ladkani <shmulik.ladkani@...il.com>
To:	Richard Genoud <richard.genoud@...il.com>
Cc:	Richard Weinberger <richard@....at>,
	Artem Bityutskiy <dedekind1@...il.com>,
	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/5] ubi: Fix bad PEBs reserve caclulation

Hi Richard,

On Fri, 6 Jul 2012 17:27:59 +0200 Richard Genoud <richard.genoud@...il.com> wrote:
> I've got an oops...
> this is my dev-kernel in 3.5-rc5 + some work to be able to boot on my board
> NB: If I use ubi_format it's ok.
> the mtd1 device has 1984 PEB
> the 4 last are UBI reserved + BBT
> 
> I didn't test without your patch, but anyway something is wrong there.

Many thanks for testing.

Could you please verify the crash only occurs with the patch?

Can you provide the vmlinux matching this oops, so I may analyze the
exact null dereferencing point?
It seems to be somewhere in ubi_wl_init, however the patch seems not to
affect these parts of ubi...

Also, what's your CONFIG_MTD_UBI_BEB_LIMIT?

Regards,
Shmulik
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