linux-kernel - Re: [PATCH 0/4] Finer granularity and task/cgroup irq time accounting

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Message-ID: <1282653596.2605.2679.camel@laptop>
Date:	Tue, 24 Aug 2010 14:39:56 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Martin Schwidefsky <schwidefsky@...ibm.com>
Cc:	balbir@...ux.vnet.ibm.com, Venkatesh Pallipadi <venki@...gle.com>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Paul Menage <menage@...gle.com>, linux-kernel@...r.kernel.org,
	Paul Turner <pjt@...gle.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Paul Mackerras <paulus@...ba.org>,
	Tony Luck <tony.luck@...el.com>
Subject: Re: [PATCH 0/4] Finer granularity and task/cgroup irq time
 accounting

On Tue, 2010-08-24 at 14:06 +0200, Martin Schwidefsky wrote:
> Well, I have sent a patch back in 2006 that stops adding the hardirq /
> softirq time to the currently running process. See
> http://lkml.org/lkml/2006/8/24/139

Time to maybe revisit that ;-)

> It did not get very far, so that answer to the question if we need
> accounting madness seems to be yes .. 

Well, that's only a little accounting, but trying to infer to what task
to account IRQ time is going to become madness.
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