linux-kernel - Re: [RFC][PATCH] irq

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Message-ID: <1277379294.1875.959.camel@laptop>
Date:	Thu, 24 Jun 2010 13:34:54 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Huang Ying <ying.huang@...el.com>,
	"H.PeterA" <"nvin hpa"@zytor.com>, linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH] irq_work

On Thu, 2010-06-24 at 13:23 +0200, Ingo Molnar wrote:

> What might make sense is to offer two types of callbacks: one that is 
> immediate whenever an event triggers - and another that is sleepable and is 
> executed from process context.

Trouble is waking that thread, you cannot wake tasks from NMI context,
so whatever you do, you'll end up with a trampoline.

You could of course offer that trampoline nicely packaged, but I'm not
sure that's really worth the effort.
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