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From: Helge Hafting <helgehaf@aitel.hist.no>
To: Jamie Lokier <jamie@shareable.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: The well-factored 386
Date: Tue, 29 Jul 2003 13:14:23 +0200	[thread overview]
Message-ID: <20030729111423.GA5320@hh.idb.hist.no> (raw)
In-Reply-To: <20030728194127.GA10673@mail.jlokier.co.uk>

On Mon, Jul 28, 2003 at 08:41:27PM +0100, Jamie Lokier wrote:
> I didn't realise he was talking about an x86 emulator.  I thought he
> was analyzing real hardware.
> 
> The one thing that made it on-topic for me was his quiet suggestion
> that "forreal" mode interrupts are faster, and that it might, perhaps,
> be possible to modify a Linux kernel to run in that mode - to take
> advantage of the faster interrupts.

That would have to be a kernel for very special use.  The "forreal"
mode has protection turned off.  As far as I know, that
means any user process can take over the cpu as if
it was running in kernel mode.

Perhaps useful for some embedded use with only a couple well-tested
processes running.  Still, a programming error could overwrite
kernel memory instead of segfaulting.

Helge Hafting

  reply	other threads:[~2003-07-29 11:09 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-07-28 16:02 The well-factored 386 Jack Dennon
2003-07-28 16:32 ` David S. Miller
2003-07-28 16:46   ` Andries Brouwer
2003-07-28 16:55     ` David S. Miller
2003-07-28 19:31       ` Herbert Pötzl
2003-07-28 19:41   ` Jamie Lokier
2003-07-29 11:14     ` Helge Hafting [this message]
2003-07-29 16:19       ` Jamie Lokier
2003-07-30  7:11         ` Helge Hafting
2003-07-30 14:05           ` Jamie Lokier
  -- strict thread matches above, loose matches on Subject: below --
2003-07-29 12:59 John Bradford
2003-07-29 13:32 ` Ville Herva
2003-07-28  8:44 The Well-Factored 386 Rick A. Hohensee
2003-07-28 14:06 ` David S. Miller
2003-07-28 16:36   ` hp
2003-07-28 20:33   ` Rick A. Hohensee
2003-07-28 20:33     ` David S. Miller
2003-07-28 22:27       ` Stephan von Krawczynski
2003-07-28 22:30         ` David S. Miller
2003-07-28 22:58           ` David D. Hagood
2003-07-29 14:32             ` Timothy Miller
2003-07-29 17:21               ` hp
2003-07-29  0:34           ` jw schultz
2003-07-29  1:27             ` Alan Cox
2003-07-29  3:49               ` Larry McVoy
2003-07-29  4:25                 ` Gene Heskett
2003-07-29  4:42                 ` jw schultz
2003-07-29 12:04                 ` Alan Cox
2003-07-29 14:55                 ` Timothy Miller
2003-07-29  8:45           ` hp
2003-07-28 23:11         ` viro
2003-07-29  0:17       ` Brian Raiter

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