Subject: Re: [rfc patch] i386: don't save eflags on task switch
From: Arjan van de Ven <arjan@infradead.org>
To: Linus Torvalds <torvalds@osdl.org>
Cc: Andi Kleen <ak@suse.de>, Zachary Amsden <zach@vmware.com>,
       Benjamin LaHaise <bcrl@kvack.org>,
       Chuck Ebbert <76306.1226@compuserve.com>,
       linux-kernel <linux-kernel@vger.kernel.org>
In-Reply-To: <Pine.LNX.4.64.0611050920220.25218@g5.osdl.org>
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	 <Pine.LNX.4.64.0611050920220.25218@g5.osdl.org>
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Organization: Intel International BV
Date: Sun, 05 Nov 2006 18:34:39 +0100
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> Andi, one single bug is usually worth _months_ of peoples time and effort. 
> How many CPU cycles is that? 

actually lockdep is pretty good at finding this type of bug IMMEDIATELY
even without the actual race triggering ;)

(but I otherwise agree that unless there is a
"sti-conditional-on-zero-flag" or something.... it's probably a void
optimization in the general uninlined case)

-- 
if you want to mail me at work (you don't), use arjan (at) linux.intel.com
Test the interaction between Linux and your BIOS via http://www.linuxfirmwarekit.org

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