From: ebiederm@xmission.com (Eric W. Biederman)
To: Andi Kleen <ak@suse.de>
Cc: Rene Herman <rene.herman@keyaccess.nl>,
Linus Torvalds <torvalds@osdl.org>,
Arjan van de Ven <arjan@linux.intel.com>,
linux-kernel@vger.kernel.org, akpm@osdl.org, mingo@elte.hu
Subject: Re: Patch to reorder functions in the vmlinux to a defined order
Date: Fri, 24 Feb 2006 13:38:02 -0700 [thread overview]
Message-ID: <m1wtfkbihh.fsf@ebiederm.dsl.xmission.com> (raw)
In-Reply-To: <200602241748.39949.ak@suse.de> (Andi Kleen's message of "Fri, 24 Feb 2006 17:48:38 +0100")
Andi Kleen <ak@suse.de> writes:
> On Friday 24 February 2006 16:55, Eric W. Biederman wrote:
>> there, and... more invasiveness?
>>
>> __pa stops working on kernel addresses.
>
> x86-64 always had this problem and it's not very hard to handle with a simple ?:
It has been several months but yes most of the pieces are simple.
Although you do loose the opportunities for several micro-optimizations,
that way. The point was simply that working with relocations is even
less intrusive. The changes stop at kernel/head.S if they even get
that far. Plus the proof that you have not pessimized things is
trivial, because nothing has changed.
The fact that your kernel virtual addresses can be at different
2MB/4MB aligned boundaries is a downside, as is the fact that your
bzImage becomes 5-10% larger because of all of the relocations.
Eric
next prev parent reply other threads:[~2006-02-24 20:39 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-23 13:19 Patch to make the head.S-must-be-first-in-vmlinux order explicit Arjan van de Ven
2006-02-23 13:42 ` Andi Kleen
2006-02-23 13:57 ` Arjan van de Ven
2006-02-23 14:14 ` Andi Kleen
2006-02-23 14:40 ` Arjan van de Ven
2006-02-24 13:49 ` Eric W. Biederman
2006-02-24 13:53 ` Arjan van de Ven
2006-02-24 14:17 ` Eric W. Biederman
2006-02-24 14:32 ` Andi Kleen
2006-02-23 15:09 ` Patch to reorder functions in the vmlinux to a defined order Arjan van de Ven
2006-02-23 16:00 ` Andi Kleen
2006-02-23 16:02 ` Arjan van de Ven
2006-02-23 16:43 ` Arjan van de Ven
2006-02-23 16:48 ` Andi Kleen
2006-02-23 16:49 ` Arjan van de Ven
2006-02-23 17:08 ` Linus Torvalds
2006-02-23 17:20 ` Andi Kleen
2006-02-23 17:34 ` Alan Cox
2006-02-23 18:13 ` Andi Kleen
2006-02-23 17:44 ` Linus Torvalds
2006-02-23 18:14 ` Andi Kleen
2006-02-23 19:03 ` linux-os (Dick Johnson)
2006-02-23 19:32 ` Linus Torvalds
2006-02-24 12:43 ` linux-os (Dick Johnson)
2006-02-23 19:23 ` Rene Herman
2006-02-23 19:31 ` Andi Kleen
2006-02-23 19:34 ` Alan Cox
2006-02-23 19:48 ` Rene Herman
2006-02-23 19:35 ` Linus Torvalds
2006-02-23 19:44 ` Arjan van de Ven
2006-02-23 20:13 ` Rene Herman
2006-02-23 20:26 ` Dave Jones
2006-02-24 2:44 ` Fernando Luis Vazquez Cao
2006-02-24 2:47 ` Andi Kleen
2006-02-24 14:44 ` Theodore Ts'o
2006-02-23 23:19 ` Linus Torvalds
2006-02-23 23:53 ` Rene Herman
2006-02-24 14:23 ` Eric W. Biederman
2006-02-24 14:23 ` Eric W. Biederman
2006-02-24 15:30 ` Rene Herman
2006-02-24 15:55 ` Eric W. Biederman
2006-02-24 16:48 ` Andi Kleen
2006-02-24 20:38 ` Eric W. Biederman [this message]
2006-02-25 2:11 ` Folkert van Heusden
2006-02-25 8:32 ` Arjan van de Ven
2006-02-24 17:26 ` Linus Torvalds
2006-02-24 17:57 ` Rene Herman
2006-02-24 18:11 ` Linus Torvalds
2006-03-07 23:36 ` H. Peter Anvin
2006-02-24 14:11 ` Eric W. Biederman
2006-02-24 1:38 ` Martin Bligh
2006-02-23 20:07 ` Andy Whitcroft
2006-02-23 16:48 ` Linus Torvalds
2006-02-23 16:54 ` Benjamin LaHaise
2006-02-23 18:01 ` Arjan van de Ven
2006-02-23 16:57 ` linux-os (Dick Johnson)
2006-02-23 17:36 ` Zwane Mwaikambo
2006-02-23 17:59 ` Arjan van de Ven
2006-02-24 22:19 ` Tony Luck
2006-02-24 22:21 ` Arjan van de Ven
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