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Date: Tue, 14 Jun 2005 12:16:40 -0500
From: Steve Lord <lord@xfs.org>
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To: Andi Kleen <ak@muc.de>
CC: "K.R. Foley" <kr@cybsft.com>, pozsy@uhulinux.hu,
       linux-kernel@vger.kernel.org, rusty@rustcorp.com.au
Subject: Re: Race condition in module load causing undefined symbols
References: <42A99D9D.7080900@xfs.org> <20050610112515.691dcb6e.akpm@osdl.org>	<20050611082642.GB17639@ojjektum.uhulinux.hu>	<42AAE5C8.9060609@xfs.org>	<20050611150525.GI17639@ojjektum.uhulinux.hu>	<42AB25E7.5000405@xfs.org> <20050611120040.084942ed.akpm@osdl.org>	<42AEDCFB.8080002@xfs.org> <42AEF979.2000207@cybsft.com>	<42AF080A.1000307@xfs.org> <m14qc0c1xl.fsf@muc.de>
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Andi Kleen wrote:
> Steve Lord <lord@xfs.org> writes:
> 
>>So is this some P4 specific optimization which is not working as
>>intended?
> 
> 
> The only pentium specific optimizations that are enabled by MPENTIUM4
> is to tell the compiler to compile for pentium4 and a few settings
> in arch/i386/Kconfig.
> 
> You could enable/disable these individually and see if you can track
> it down with a binary search.
> 
> Most of this stuff should be fairly harmless though and be only
> microoptimizations; I cannot see how they should cause user visible
> races.
> 
> -Andi
> 

I see what you mean about there not being a lot of difference
between the two, however, the other difference between the builds
would be -mtune=pentium3 and -mtune=pentium4.

Steve