From: Frederic Weisbecker <fweisbec@gmail.com>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Christoph Lameter <cl@linux.com>,
Hakan Akkan <hakanakkan@gmail.com>,
Kevin Hilman <khilman@linaro.org>,
Li Zhong <zhong@linux.vnet.ibm.com>,
Paul Gortmaker <paul.gortmaker@windriver.com>,
Peter Zijlstra <peterz@infradead.org>,
Steven Rostedt <rostedt@goodmis.org>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 1/2] nohz: Select VIRT_CPU_ACCOUNTING_GEN from full dynticks config
Date: Fri, 26 Apr 2013 18:22:15 +0200 [thread overview]
Message-ID: <20130426162214.GB30716@somewhere> (raw)
In-Reply-To: <20130426153956.GB3860@linux.vnet.ibm.com>
On Fri, Apr 26, 2013 at 08:39:56AM -0700, Paul E. McKenney wrote:
> > config VIRT_CPU_ACCOUNTING_GEN
> > bool "Full dynticks CPU time accounting"
> > - depends on HAVE_CONTEXT_TRACKING && 64BIT
> > + depends on HAVE_CONTEXT_TRACKING && 64BIT && NO_HZ_FULL
>
> Do you really want this change? This prohibits VIRT_CPU_ACCOUNTING_GEN
> unless NO_HZ_FULL, which means that it can no longer be used in situations
> where it used to be usable. My guess is that you want to leave this
> particular line as it was.
Hmm, this can make sense. This can be used to perform comparisons between
tick-based and tickless cputime accounting easily.
I'll respin.
next prev parent reply other threads:[~2013-04-26 16:22 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-26 14:53 [GIT PULL] nohz: A few improvements Frederic Weisbecker
2013-04-26 14:53 ` [PATCH 1/2] nohz: Select VIRT_CPU_ACCOUNTING_GEN from full dynticks config Frederic Weisbecker
2013-04-26 15:39 ` Paul E. McKenney
2013-04-26 16:22 ` Frederic Weisbecker [this message]
2013-04-26 23:01 ` Frederic Weisbecker
2013-04-27 7:19 ` Ingo Molnar
2013-05-13 21:16 ` Kevin Hilman
2013-04-26 14:53 ` [PATCH 2/2] cputime_nsecs: use math64.h for nsec resolution conversion helpers Frederic Weisbecker
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