linux-kernel - Re: [git pull] drm: previous pull req + 1.

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Message-ID: <alpine.LFD.2.01.0906221241130.3240@localhost.localdomain>
Date:	Mon, 22 Jun 2009 12:43:06 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Andrew Lutomirski <luto@....edu>
cc:	Thomas Hellström <thomas@...pmail.org>,
	Dave Airlie <airlied@...ux.ie>,
	Alex Deucher <alexdeucher@...il.com>, dri-devel@...ts.sf.net,
	Jerome Glisse <jglisse@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [git pull] drm: previous pull req + 1.



On Mon, 22 Jun 2009, Andrew Lutomirski wrote:
> 
> What if we only guaranteed that the framebuffer is mapped when it's
> showing on the screen?

I think that works ok. We only care about printk being immediate in that 
case, and if it gets buffered I don't think we care.

> printk doesn't need to write to the framebuffer immediately when X
> isn't running (since the framebuffer isn't shown) and presumably the
> framebuffer needs to be pinned somewhere when it's being displayed
> anyway.  This would involve fbcon knowing how to buffer text to be
> shown later so that printk still works in interrupt context.

But doesn't fbcon do that _anyway_ for VC switching?

(I've tried to stay out of fbcon, and have traditionally personally always 
preferred just regular VGA text mode, so I really have no clue about the 
internals).

			Linus
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