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Subject: Re: [RFC][PATCH v2 4/7] taskstats: Add per task steal time
 accounting
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
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Date: Mon, 15 Nov 2010 18:45:52 +0100
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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>
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On Mon, 2010-11-15 at 18:42 +0100, Martin Schwidefsky wrote:
> I do not know if that is true for
> ia64 as well which is the third architecture with VIRT_CPU_ACCOUNTING=y. 

IIRC ia64 uses VIRT_CPU_ACCOUNTING to get high-res task accounting, it
was done before CFS came around and used ns based accounting for all
tasks.