From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Arvind Sankar <arvinds@MIT.EDU>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: vesafb mtrr setup question
Date: 27 Aug 2003 16:14:54 +0100 [thread overview]
Message-ID: <1061997292.22721.47.camel@dhcp23.swansea.linux.org.uk> (raw)
In-Reply-To: <20030826155044.GA27105@m66-080-18.mit.edu>
On Maw, 2003-08-26 at 16:50, Arvind Sankar wrote:
> Ah. On a side not, could you drop a quick hint as to how
> screen_info.lfb_size is obtained?
>
> In older (or just different?) versions of vesafb, the video_size was
> actually computed by multiplying xres, yres, and the bpp.
The BIOS will provide the size of the LFB. In 2.4 we now work out the
size we need for a sensible amount of scrollback and the like because
the LFB size may be huge (256Mb for example) and we don't want to blow
all our kernel address space on a useless mapping
prev parent reply other threads:[~2003-08-27 15:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-25 19:43 Arvind Sankar
2003-08-26 15:42 ` Alan Cox
2003-08-26 15:50 ` Arvind Sankar
2003-08-27 15:14 ` Alan Cox [this message]
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