linux-kernel - Re: [PATCH] Restore deterministic CPU accounting on powerpc

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Message-ID: <18220.24362.604297.53633@cargo.ozlabs.ibm.com>
Date:	Sat, 3 Nov 2007 22:44:42 +1100
From:	Paul Mackerras <paulus@...ba.org>
To:	"Balbir Singh" <balbir@...ux.vnet.ibm.com>
Cc:	"Ingo Molnar" <mingo@...e.hu>,
	"Peter Zijlstra" <a.p.zijlstra@...llo.nl>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"Martin Schwidefsky" <schwidefsky@...ibm.com>,
	"Christian Borntraeger" <borntraeger@...ibm.com>,
	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org
Subject: Re: [PATCH] Restore deterministic CPU accounting on powerpc

Balbir Singh writes:

> So, scaled accounting will not be available if
> CONFIG_VIRT_CPU_ACCOUNTING is defined? Am I reading this correctly

No, what makes you think that?  If VIRT_CPU_ACCOUNTING=y it is the
responsibility of the arch's account_process_tick to update the scaled
stats.  And the powerpc version does that by calling
account_user_time_scaled().

Paul.
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