linux-kernel - Re: [PATCH] De-macro spin_trylock_irq, spin_trylock_irqsave, write_trylock

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Message-ID: <20080817093114.GA21303@elte.hu>
Date:	Sun, 17 Aug 2008 11:31:15 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Johannes Weiner <hannes@...urebad.de>
Cc:	Alexey Dobriyan <adobriyan@...il.com>, torvalds@...l.org,
	akpm@...l.org, linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH] De-macro spin_trylock_irq, spin_trylock_irqsave,
	write_trylock_irqsave


* Johannes Weiner <hannes@...urebad.de> wrote:

> >> (but it would also be hugely invasive, with not much upside with 
> >> tons of downside like years of migration fallout and having to 
> >> rewrite hundreds of kernel hacking books ;-) )
> >
> > I want my money back for scheduler chapter from "Understanding the 
> > Linux Kernel"!
> 
> I agree that this argument of Ingo's is not a very good one... ;)

i see the smiley, but still - there's a huge difference between the 
"pain" caused by a much better scheduler [ hey, did you expect me to say 
anything else? ;-) ] and a rather arbitrary value->pointer parametering 
change to a core API that is used _everywhere_.

	Ingo
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