From: Matt Mackall <mpm@selenic.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
Jonathan Campbell <jon@nerdgrounds.com>,
linux-kernel@vger.kernel.org
Subject: Re: Patches for REALLY TINY 386 kernels
Date: Wed, 18 Jul 2007 15:41:02 -0500 [thread overview]
Message-ID: <20070718204102.GM11115@waste.org> (raw)
In-Reply-To: <20070718201043.GF3898@one.firstfloor.org>
On Wed, Jul 18, 2007 at 10:10:43PM +0200, Andi Kleen wrote:
>
> I was waiting for someone to make that "point" ...
>
> >
> > Every byte you can shave off the compressed kernel image is another
> > byte you can use for userspace on your FLASH.
>
> Now let's see if that 1MB 386 contains any flash at all. Guesses?
I've certainly worked on such devices. I expect there are more of them
still in service, than, say, Voyagers.
I haven't looked at whether this CPUID stuff is worth the trouble, I'm
just responding to your argument about init code. Init code is
definitely not free. It takes up storage space, which can be extremely
valuable.
The deeper point is: if you know what your platform is, platform
feature detection is a waste of code, regardless of whether it's
marked init or not.
--
Mathematics is the supreme nostalgia of our time.
next prev parent reply other threads:[~2007-07-18 20:41 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-15 21:00 Patches for REALLY TINY 386 kernels Jonathan Campbell
2007-07-15 21:42 ` Nigel Cunningham
2007-07-15 22:45 ` Alan Cox
2007-07-15 23:12 ` Nigel Cunningham
2007-07-15 23:14 ` Satyam Sharma
2007-07-15 23:13 ` Arnd Bergmann
2007-07-15 23:28 ` Satyam Sharma
2007-07-15 23:05 ` Adrian Bunk
2007-07-15 23:08 ` H. Peter Anvin
2007-07-17 10:59 ` Jan Engelhardt
2007-07-17 19:30 ` Matt Mackall
2007-07-18 2:33 ` Andi Kleen
2007-07-18 15:55 ` H. Peter Anvin
2007-07-18 18:20 ` Andi Kleen
2007-07-18 18:29 ` Jan Engelhardt
2007-07-18 18:38 ` Andi Kleen
2007-07-18 18:45 ` Jan Engelhardt
2007-07-18 18:47 ` Andi Kleen
2007-07-18 20:24 ` John Stoffel
2007-07-18 18:33 ` Adrian Bunk
2007-07-18 18:42 ` Jan Engelhardt
2007-07-18 18:44 ` Andi Kleen
2007-07-18 19:00 ` H. Peter Anvin
2007-07-21 10:09 ` Oleg Verych
2007-07-18 19:41 ` Matt Mackall
2007-07-18 19:50 ` H. Peter Anvin
2007-07-18 20:10 ` Andi Kleen
2007-07-18 20:24 ` H. Peter Anvin
2007-07-18 21:04 ` Andi Kleen
2007-07-18 22:17 ` H. Peter Anvin
2007-07-30 17:59 ` Denis Vlasenko
2007-07-18 20:41 ` Matt Mackall [this message]
2007-07-20 7:27 ` Uwe Hermann
2007-07-20 7:35 ` Andi Kleen
2007-07-24 14:49 ` Helge Hafting
2007-07-24 20:50 ` Yinghai Lu
2007-07-24 22:56 ` Adrian Bunk
2007-07-25 0:55 ` Yinghai Lu
2007-07-24 22:45 ` Willy Tarreau
[not found] <8HjYY-4Jk-15@gated-at.bofh.it>
[not found] ` <8HlxM-7iT-13@gated-at.bofh.it>
[not found] ` <8HlxL-7iT-11@gated-at.bofh.it>
[not found] ` <8HlHq-7vR-17@gated-at.bofh.it>
[not found] ` <8HlHr-7vR-25@gated-at.bofh.it>
2007-07-16 13:12 ` Bodo Eggert
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