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

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Message-ID: <20100624130234.GM578@basil.fritz.box>
Date:	Thu, 24 Jun 2010 15:02:34 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Andi Kleen <andi@...stfloor.org>,
	Huang Ying <ying.huang@...el.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Borislav Petkov <petkovbb@...glemail.com>,
	linux-kernel@...r.kernel.org, mauro@...e.hu
Subject: Re: [RFC][PATCH] irq_work

On Thu, Jun 24, 2010 at 02:35:37PM +0200, Ingo Molnar wrote:
> All of these solutions use the fact that perf events are a generic event 
> framework. If there's any missing details somewhere then fixes/enhancements 
> can be added - right now our in-kernel event consumers are simple. But the 
> design is sound.

One immediate problem that comes to mind with the proposal 
is that if the event is of a type that cannot be dropped (e.g. an error 
that needs to be handled) then a shared ring buffer cannot guarantee that.

-Andi

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