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Message-ID: <43C502AA.1040200@gmail.com>
Date: Wed, 11 Jan 2006 21:05:46 +0800
From: "Antonino A. Daplas" <adaplas@gmail.com>
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To: Andi Kleen <ak@suse.de>
CC: Jan Engelhardt <jengelh@linux01.gwdg.de>, Dave Jones <davej@redhat.com>,
       linux-kernel@vger.kernel.org
Subject: Re: Console debugging wishlist was: Re: oops pauser.
References: <20060105045212.GA15789@redhat.com> <Pine.LNX.4.61.0601102121400.16049@yvahk01.tjqt.qr> <43C4F8EE.10201@gmail.com> <200601111331.45940.ak@suse.de>
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Andi Kleen wrote:
> On Wednesday 11 January 2006 13:24, Antonino A. Daplas wrote:
> 
>> In the VGA console, all buffers, including scrollback is in video RAM, but
>> the size is fixed and is very small.
> 
> I wonder if that can be fixed.

It can be done, but it will affect VGA console performance.
 
> 
>> With the framebuffer console, you can increase the size of the scrollback
>> buffer with the boot option:
>>
>> fbcon=scrollback:<n> (default is 32K)
> 
> On x86-64 vesafb is unusable slow because it does CPU scrolling cause
> it can't use the vesa BIOS - and the others don't work everywhere. So I don't
> think fbcon is an usable replacement.

How about vga16fb + fbcon? If scrolling is slow in vga16fb, fbset -vyres 800 should
increase performance significantly.

Tony
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