From: Jeremy Fitzhardinge <jeremy@goop.org>
To: "linux-os (Dick Johnson)" <linux-os@analogic.com>
Cc: Linus Torvalds <torvalds@osdl.org>, Ingo Molnar <mingo@elte.hu>,
Andi Kleen <ak@suse.de>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Arjan van de Ven <arjan@infradead.org>,
Zachary Amsden <zach@vmware.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Michael A Fetterman <Michael.Fetterman@cl.cam.ac.uk>
Subject: Re: Assignment of GDT entries
Date: Wed, 13 Sep 2006 13:08:51 -0700 [thread overview]
Message-ID: <45086553.4090804@goop.org> (raw)
In-Reply-To: <Pine.LNX.4.61.0609131523390.28091@chaos.analogic.com>
linux-os (Dick Johnson) wrote:
> The entries 1 through 3 are used during the boot sequence, see
> setup.S, search for "gdt" around line 983.
>
OK, but that's an early GDT used during boot, which shouldn't have any
bearing on the GDT of the running kernel.
> I can't imagine a reason why you'd want to do this.
>
I'm looking at packing all the descriptors together so they share a
cache line, and therefore reduce the likelihood of a cache miss when
loading a segment register.
J
next prev parent reply other threads:[~2006-09-13 20:09 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-13 18:58 Assignment of GDT entries Jeremy Fitzhardinge
2006-09-13 19:16 ` Arjan van de Ven
2006-09-13 20:00 ` Alan Cox
2006-09-13 20:02 ` Jeremy Fitzhardinge
2006-09-13 20:20 ` Jeremy Fitzhardinge
2006-09-13 20:59 ` Zachary Amsden
2006-09-13 21:15 ` Jeremy Fitzhardinge
2006-09-13 21:35 ` Alan Cox
2006-09-14 0:25 ` Zachary Amsden
2006-09-14 1:40 ` Stephen Rothwell
2006-09-14 13:03 ` Alan Cox
2006-09-13 19:55 ` linux-os (Dick Johnson)
2006-09-13 20:08 ` Jeremy Fitzhardinge [this message]
2006-09-13 20:32 ` linux-os (Dick Johnson)
2006-09-13 21:21 ` Linus Torvalds
2006-09-13 21:47 ` Jeremy Fitzhardinge
2006-09-13 22:05 ` Linus Torvalds
2006-09-13 22:22 ` Jeremy Fitzhardinge
2006-09-14 6:00 ` Andi Kleen
-- strict thread matches above, loose matches on Subject: below --
2006-09-14 3:23 Albert Cahalan
2006-09-14 6:11 ` Jeremy Fitzhardinge
2006-09-14 4:06 Albert Cahalan
2006-09-14 4:44 ` Eric W. Biederman
2006-09-14 6:19 ` Albert Cahalan
2006-09-14 6:28 ` Zachary Amsden
2006-09-14 7:12 ` Albert Cahalan
2006-09-14 7:24 ` Zachary Amsden
2006-09-14 6:29 ` Jeremy Fitzhardinge
2006-09-15 7:55 Mikael Pettersson
2006-09-15 8:20 ` Jeremy Fitzhardinge
2006-09-15 8:58 ` Mikael Pettersson
2006-09-15 18:27 ` Jeremy Fitzhardinge
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