linux-kernel - Re: [PATCH 00/10] jump label: introduce very

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Message-ID: <4F45077D.5090409@zytor.com>
Date:	Wed, 22 Feb 2012 07:19:25 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	Ingo Molnar <mingo@...e.hu>, Jason Baron <jbaron@...hat.com>,
	a.p.zijlstra@...llo.nl, mathieu.desnoyers@...icios.com,
	davem@...emloft.net, ddaney.cavm@...il.com,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 00/10] jump label: introduce very_[un]likely + cleanups
 + docs

On 02/22/2012 07:12 AM, Steven Rostedt wrote:
> 
> Again, I'm using gcc 4.6.0 and maybe it has been fixed.
> 

I think this really comes down to the branches being as biased as you
might have wanted for this case.  gcc will reorder its basic blocks
based on what it thinks is best based on some kinds of voodoo and asm
goto is only one type of control transfer it will take into account.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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