linux-kernel - Re: [PATCH RFC 0/6] Implement per-processor data areas for i386.

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Message-Id: <200608272004.38280.ak@suse.de>
Date:	Sun, 27 Aug 2006 20:04:38 +0200
From:	Andi Kleen <ak@...e.de>
To:	Andreas Mohr <andi@...x01.fht-esslingen.de>
Cc:	Jeremy Fitzhardinge <jeremy@...p.org>,
	linux-kernel@...r.kernel.org,
	Chuck Ebbert <76306.1226@...puserve.com>,
	Zachary Amsden <zach@...are.com>,
	Jan Beulich <jbeulich@...ell.com>,
	Andrew Morton <akpm@...l.org>
Subject: Re: [PATCH RFC 0/6] Implement per-processor data areas for i386.


> Something like that had to be done eventually about the inefficient
> current_thread_info() mechanism, 

Inefficient? It's two fast instructions. I won't call that inefficient.

> I guess it's due to having tried that on an older installation with gcc 3.2,
> which probably does less efficient opcode merging of current_thread_info()
> requests compared to a current gcc version.

gcc normally doesn't merge inline assembly at all.

-Andi
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