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Date: Thu, 27 Mar 2003 14:27:41 -0800
From: Walt H <waltabbyh@comcast.net>
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To: thunder7@xs4all.nl
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: vesafb problem
References: <3E8329D2.7040909@comcast.net> <20030327190222.GA4060@middle.of.nowhere>
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> One not very good way for you to proceed would be to change the
> definition of VMALLOC_RESERVE from (128 << 20) to something like (256
> << 20), which should leave the driver room to ioremap the framebuffer.
> This is a little ugly.  However, I don't see why a framebuffer driver
> would need to ioremap _all_ of a video card's memory -- so a better
> solution would be to fix the driver to only ioremap what it needs to.
> 
> Best,
>   Roland
> ======================================================
> 
> To see if this is it, booting with mem=512M would be a good test.
> 
> Kind regards,
> Jurriaan

Well, I've answered my own question regarding highmem. Reserving 256MB 
ram causes high-mem mapped IO to fail. I can have penguins, but no 
filesystems or no penguins and a useable system. I'm guessing that I 
could probably turn off HIGHMEM and HIGHMEM-IO and might be able to get 
penguins back, but at the cost of reduced system performance. I'm not a 
kernel hacker, but I might just see how bad I can break vesafb to remap 
only the necessary memory for the requested video mode. Perhaps that 
would fix the whole thing?

-Walt

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