Subject: Re: [RFC][PATCH v2 4/7] taskstats: Add per task steal time
 accounting
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Michael Holzheu <holzheu@linux.vnet.ibm.com>,
        Shailabh Nagar <nagar1234@in.ibm.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Venkatesh Pallipadi <venki@google.com>,
        Suresh Siddha <suresh.b.siddha@intel.com>, Ingo Molnar <mingo@elte.hu>,
        Oleg Nesterov <oleg@redhat.com>, John stultz <johnstul@us.ibm.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Balbir Singh <balbir@linux.vnet.ibm.com>,
        Heiko Carstens <heiko.carstens@de.ibm.com>,
        Roland McGrath <roland@redhat.com>, linux-kernel@vger.kernel.org,
        linux-s390@vger.kernel.org,
        "jeremy.fitzhardinge" <jeremy.fitzhardinge@citrix.com>
In-Reply-To: <20101115184206.4463fd05@mschwide.boeblingen.de.ibm.com>
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	 <1289677083.2109.167.camel@laptop>
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	 <20101115184206.4463fd05@mschwide.boeblingen.de.ibm.com>
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Date: Mon, 15 Nov 2010 18:48:32 +0100
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On Mon, 2010-11-15 at 18:42 +0100, Martin Schwidefsky wrote:
> Would you prefer another #ifdef orgy to
> avoid the overhead for VIRT_CPU_ACCOUNTING=n? We can certainly do
> that.
> 
That still doesn't answer the question, why do you want this? What is
per task steal time accounting good for? What problem is being solved?
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