linux-kernel - Re: [RFC 1/3] Unified NMI delayed call mechanism

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Message-ID: <20100618143749.GA14034@elte.hu>
Date:	Fri, 18 Jun 2010 16:37:49 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Huang Ying <ying.huang@...el.com>,
	"H.PeterA" <"nvin hpa"@zytor.com>, linux-kernel@...r.kernel.org,
	Chris Mason <chris.mason@...cle.com>
Subject: Re: [RFC 1/3] Unified NMI delayed call mechanism


* Andi Kleen <andi@...stfloor.org> wrote:

> > So aside from the should this be perf or not, the above is utter
> > gibberish. Whoever came up with this nonsense?
> 
> This is pretty much how softirqs (and before them bottom halves) work.
> I believe Linus invented that scheme originally back in the early
> days of Linux.

Nope - the softirq code was written by Alexey Kuznetsov and David S. Miller. 
But it's irrelevant, because:

> It's actually quite simple and works well

... as Peter said the last thing we want is yet another softirq vector.

Thanks,

	Ingo
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