linux-kernel - Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures

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Date:	Thu, 16 Aug 2007 03:26:02 +0200
From:	Segher Boessenkool <segher@...nel.crashing.org>
To:	Herbert Xu <herbert.xu@...hat.com>
Cc:	heiko.carstens@...ibm.com, horms@...ge.net.au,
	linux-kernel@...r.kernel.org, rpjday@...dspring.com, ak@...e.de,
	netdev@...r.kernel.org, cfriesen@...tel.com,
	akpm@...ux-foundation.org, torvalds@...ux-foundation.org,
	jesper.juhl@...il.com, linux-arch@...r.kernel.org, zlynx@....org,
	satyam@...radead.org, clameter@....com, schwidefsky@...ibm.com,
	Chris Snook <csnook@...hat.com>, davem@...emloft.net,
	wensong@...ux-vs.org, wjiang@...ilience.com
Subject: Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures

>> Part of the motivation here is to fix heisenbugs.  If I knew where 
>> they
>
> By the same token we should probably disable optimisations
> altogether since that too can create heisenbugs.

Almost everything is a tradeoff; and so is this.  I don't
believe most people would find disabling all compiler
optimisations an acceptable price to pay for some peace
of mind.


Segher

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