From: Andi Kleen <ak@muc.de>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: KendallB@scitechsoft.com, linux-kernel@vger.kernel.org
Subject: Re: Generic VESA framebuffer driver and Video card BOOT?
Date: Fri, 15 Oct 2004 16:22:56 +0200 [thread overview]
Message-ID: <m3655cjc1r.fsf@averell.firstfloor.org> (raw)
In-Reply-To: <2PAMY-7Ir-21@gated-at.bofh.it> (Alan Cox's message of "Fri, 15 Oct 2004 16:00:20 +0200")
Alan Cox <alan@lxorguk.ukuu.org.uk> writes:
> On Iau, 2004-10-14 at 21:46, Kendall Bennett wrote:
>> a way to spawn a user mode process that early in the boot sequence (it
>> would have to come from the initrd image I expect) then the only option
>> is to compile it into the kernel.
>
> There is exactly that in 2.6 - the hotplug interfaces allow the kernel
> to fire off userspace programs. Jon Smirl (who you should definitely
> talk to about this stuff) has been hammering out a design for moving
> almost all the mode switching into user space for kernel video.
The problem is that this would imply that the console would only
work after user space is running. Even with initrd that's quite late.
The only way I see to make that fly would be a very good early
console implementation, otherwise tracking down any problems will
be hell (how do you display "panic no rootfs found" without console?)
And writing a good early console implementation would have all the
same problems as the current one.
So I can see Kendall's point.
-Andi
next parent reply other threads:[~2004-10-15 14:24 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <2Pkf0-42m-11@gated-at.bofh.it>
[not found] ` <2PncW-6j9-19@gated-at.bofh.it>
[not found] ` <2PncW-6j9-21@gated-at.bofh.it>
[not found] ` <20030401205016$5cc4@gated-at.bofh.it>
[not found] ` <20030401205016$63f7@gated-at.bofh.it>
[not found] ` <20030424075011$4028@gated-at.bofh.it>
[not found] ` <1ewKr-2Kh-41@gated-at.bofh.it>
[not found] ` <CebL.O9.13@gated-at.bofh.it>
[not found] ` <1bucs-57R-33@gated-at.bofh.it>
[not found] ` <2PncW-6j9-23@gated-at.bofh.it>
[not found] ` <20030423094012$4166@gated-at.bofh.it>
[not found] ` <2PncW-6j9-17@gated-at.bofh.it>
[not found] ` <2PAMY-7Ir-21@gated-at.bofh.it>
2004-10-15 14:22 ` Andi Kleen [this message]
2004-10-15 14:33 ` Generic VESA framebuffer driver and Video card BOOT? Alan Cox
2004-10-15 18:20 ` Kendall Bennett
2004-10-15 18:39 ` Alan Cox
2004-10-15 22:27 ` Kendall Bennett
2004-10-15 23:34 ` Alan Cox
2004-10-16 1:07 ` William Lee Irwin III
2004-10-21 11:59 ` Pavel Machek
2004-10-18 11:44 ` Martin Waitz
2004-10-18 19:43 ` Kendall Bennett
2004-10-19 17:01 ` Martin Waitz
2004-10-19 17:54 ` Kendall Bennett
2004-10-15 15:37 ` Gerd Knorr
2004-10-16 0:55 ` Andi Kleen
2004-10-16 12:21 ` Gerd Knorr
2004-10-21 4:03 Yu, Luming
[not found] <2PjiW-3hl-21@gated-at.bofh.it>
2004-10-14 20:03 ` Andi Kleen
2004-10-14 20:46 ` Kendall Bennett
2004-10-15 12:39 ` Alan Cox
2004-10-15 18:20 ` Kendall Bennett
2004-10-15 18:41 ` Alan Cox
2004-10-15 20:19 ` Jon Smirl
2004-10-15 22:22 ` Kendall Bennett
2004-10-15 23:02 ` Jon Smirl
2004-10-19 21:09 ` Pavel Machek
2004-10-20 15:23 ` Paulo Marques
2004-10-20 17:27 ` Kendall Bennett
-- strict thread matches above, loose matches on Subject: below --
2004-10-14 19:02 Kendall Bennett
2004-10-15 13:48 ` Helge Hafting
2004-10-15 18:36 ` Kendall Bennett
2004-10-15 21:44 ` Helge Hafting
2004-10-15 22:12 ` Kendall Bennett
2004-10-16 17:44 ` Jon Smirl
2004-10-19 21:00 ` Pavel Machek
2004-10-19 21:11 ` Pavel Machek
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