linux-kernel - Re: [PATCH -v7][RFC]: mutex: implement adaptive spinning

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Date:	Fri, 09 Jan 2009 13:41:59 -0800
From:	Harvey Harrison <harvey.harrison@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>, Andi Kleen <andi@...stfloor.org>,
	Chris Mason <chris.mason@...cle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	paulmck@...ux.vnet.ibm.com, Gregory Haskins <ghaskins@...ell.com>,
	Matthew Wilcox <matthew@....cx>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-btrfs <linux-btrfs@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Nick Piggin <npiggin@...e.de>,
	Peter Morreale <pmorreale@...ell.com>,
	Sven Dietrich <SDietrich@...ell.com>
Subject: Re: [PATCH -v7][RFC]: mutex: implement adaptive spinning

On Fri, 2009-01-09 at 22:34 +0100, Ingo Molnar wrote:
> The naming problem remains though:
> 
> - Perhaps we could introduce a name for the first category: __must_inline? 
>   __should_inline? Not because it wouldnt mean 'always', but because it is 
>   'always inline' for another reason than the correctless __always_inline.
> 
> - Another possible approach wuld be to rename the second category to 
>   __force_inline. That would signal it rather forcefully that the inlining 
>   there is an absolute correctness issue.

__needs_inline?  That would imply that it's for correctness reasons.

Then __always_inline is left to mean that it doesn't _need_ to be inline
but we _want_ it inline regardless of what gcc thinks?

$0.02

Harvey

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