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From: Nick Piggin <nickpiggin@yahoo.com.au>
To: wixor <wixorpeek@gmail.com>
Subject: Re: viafb triggers BUG at mm/vmalloc.c:294 [kernel 2.6.28.3]
Date: Mon, 9 Feb 2009 21:54:45 +1100
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Cc: Alexey Dobriyan <adobriyan@gmail.com>,
       Arjan van de Ven <arjan@infradead.org>, JosephChan@via.com.tw,
       linux-kernel@vger.kernel.org
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On Monday 09 February 2009 21:06:32 wixor wrote:
> Yes, that is somehow better. BUG is gone, it says now
>    vmap allocation failed: use vmalloc=<size> to increase size
> and then
>    ioremap failed.
> The driver still doesn't work however.

Quite possibly then it is a bad size being passed to ioremap.
(as you said you still have a few hundred GB of vmalloc space
free).

Could you printk the value of the 'size' variable, and also
call WARN() in the case of allocation failure?