linux-kernel - Re: Vramfs: filesystem driver to utilize extra RAM on VGA devices

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Message-ID: <497E4919.60907@zytor.com>
Date:	Mon, 26 Jan 2009 15:36:57 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Jonathan Campbell <jon@...dgrounds.com>
CC:	Linux Kernel List <linux-kernel@...r.kernel.org>,
	devel@...verdev.osuosl.org
Subject: Re: Vramfs: filesystem driver to utilize extra RAM on VGA devices

Jonathan Campbell wrote:
> 
> So far I've tested it against 2.6.25.17 and 2.6.28 on both x86 and 
> x86_64 with reads, writes, directory creation, symlink creation, and 
> mmap() and it seems to work fine.
> Just give it a range of memory on the bus, or the 
> domain:bus:device:function numbers of a VGA PCI device, and it will 
> mount the VGA video RAM and allow files to exist there.
> As a special hack: you can also specify the size of the active 
> framebuffer console so that fbcon doesn't collide with this driver 
> (unless you want to see what your files look like splattered across your 
> screen, ha). The active VRAM area becomes a "sentinel" file named 
> "framebuffer".
> 
> What do you guys think?
> 

How is this different from the MTD driver we already have?

	-hpa
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