From: Andi Kleen <ak@suse.de>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Chuck Ebbert <76306.1226@compuserve.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
Zachary Amsden <zach@vmware.com>,
Jan Beulich <jbeulich@novell.com>, Andrew Morton <akpm@osdl.org>
Subject: Re: [PATCH RFC 0/6] Implement per-processor data areas for i386.
Date: Wed, 30 Aug 2006 19:32:38 +0200 [thread overview]
Message-ID: <200608301932.38359.ak@suse.de> (raw)
In-Reply-To: <44F5C73F.2060308@goop.org>
On Wednesday 30 August 2006 19:13, Jeremy Fitzhardinge wrote:
> Andi Kleen wrote:
> > I tried that once on x86-64, but it wasn't possible because the linker
> > is missing the right relocations. It has something on the first look similar
> > for __thread data in user space, but it wasn't usable for the kernel.
> >
> The other difficulty is that you can't take the addresses of things in
> the pda and pass them around, which happens a lot.
The user space __thread works around this by always storing the address at
offset 0. Kernel does it similar, except it's not at offset 0.
> (Hm, it would be interesting to see if we could possibly use the code
> generated by gcc for TLS variables...)
I tried once on 64bit and it wasn't possible for various reasons.
-Andi
next prev parent reply other threads:[~2006-08-30 17:32 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-30 12:33 [PATCH RFC 0/6] Implement per-processor data areas for i386 Chuck Ebbert
2006-08-30 12:54 ` Andi Kleen
2006-08-30 16:39 ` Jeremy Fitzhardinge
2006-08-30 16:48 ` Andi Kleen
2006-08-30 17:13 ` Jeremy Fitzhardinge
2006-08-30 17:32 ` Andi Kleen [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-08-30 9:00 Chuck Ebbert
2006-08-30 9:17 ` Jeremy Fitzhardinge
2006-08-28 9:06 Chuck Ebbert
2006-08-27 8:44 Jeremy Fitzhardinge
2006-08-27 9:47 ` Arjan van de Ven
2006-08-27 16:46 ` Jeremy Fitzhardinge
2006-08-27 17:44 ` Arjan van de Ven
2006-08-27 18:07 ` Andi Kleen
2006-08-27 18:27 ` Jeremy Fitzhardinge
2006-08-27 16:01 ` Andi Kleen
2006-08-27 16:41 ` Jeremy Fitzhardinge
2006-08-27 17:21 ` Andreas Mohr
2006-08-27 17:34 ` Jeremy Fitzhardinge
2006-08-27 18:23 ` Andreas Mohr
2006-08-27 18:04 ` Andi Kleen
2006-08-27 18:27 ` Andreas Mohr
2006-08-27 18:35 ` Andi Kleen
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