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

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Message-ID: <20100624110830.GC578@basil.fritz.box>
Date:	Thu, 24 Jun 2010 13:08:30 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Huang Ying <ying.huang@...el.com>, Ingo Molnar <mingo@...e.hu>,
	"H.PeterA" <"nvin hpa"@zytor.com>, linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH] irq_work

> And I really want hardirq context for perf callbacks, some code actually
> relies on it (I used to have the fallback in the timer softirq and that

Surely that could be fixed?  *requiring* hard irq context sounds weird.

> broke thing at some point).

I have one case that needs to sleep (but only when interrupting user code)
They key thing in it really is to switch stacks back to process.

-andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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