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From: Ingo Molnar <mingo@kernel.org>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Peter Zijlstra <peterz@infradead.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Alessio Igor Bogani <abogani@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Avi Kivity <avi@redhat.com>, Chris Metcalf <cmetcalf@tilera.com>,
	Christoph Lameter <cl@linux.com>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Geoff Levand <geoff@infradead.org>,
	Gilad Ben Yossef <gilad@benyossef.com>,
	Hakan Akkan <hakanakkan@gmail.com>, Kevin Hilman <khilman@ti.com>,
	Max Krasnyansky <maxk@qualcomm.com>,
	"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
	Stephen Hemminger <shemminger@vyatta.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Sven-Thorsten Dietrich <thebigcorporation@gmail.com>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	"Luck,Tony" <tony.luck@intel.com>
Subject: Re: [RFC GIT PULL] nohz: Basic cputime accounting for adaptive tickless
Date: Thu, 14 Jun 2012 16:36:33 +0200	[thread overview]
Message-ID: <20120614143633.GA32094@gmail.com> (raw)
In-Reply-To: <20120614130425.GC16848@somewhere>


* Frederic Weisbecker <fweisbec@gmail.com> wrote:

> > > > > > I'll try something with that.
> > > > > 
> > > > > Maybe sanitize all the variants under a single set of 
> > > > > wrappers/callbacks?
> > > > 
> > > > Yes, please!
> > > 
> > > Sure, I'm working in it.
> >  
> > Please keep me in the loop, I want to avoid that things 
> > break on s390. Thanks.
> 
> Well, I realize I can't consolidate much between ia64, s390 
> and ppc because they all handle virtual cpu time accounting 
> very differently. I'm also not what the virtual timer is for.

As a first step I'd suggest to create a superset of all existing 
and relied-upon wrappers/callbacks, into a single obvious 
sched_*() or time_*() namespace, without breaking functionality.

Once that is done we can eliminate individual, conceptually 
redundant callbacks, by carefully morphing the affected arches 
step by step.

No arch will be left behind.

Thanks,

	Ingo

  reply	other threads:[~2012-06-14 14:36 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-13 16:19 [RFC GIT PULL] nohz: Basic cputime accounting for adaptive tickless Frederic Weisbecker
2012-06-13 16:19 ` [PATCH 1/7] nohz: Add more comment about CONFIG_NO_HZ Frederic Weisbecker
2012-06-13 16:19 ` [PATCH 2/7] nohz: Introduce adaptive nohz config Frederic Weisbecker
2012-06-13 16:19 ` [PATCH 3/7] nohz: Generalize tickless cpu time accounting Frederic Weisbecker
2012-06-13 16:19 ` [PATCH 4/7] nohz: Account user and system times in adaptive nohz mode Frederic Weisbecker
2012-06-13 16:19 ` [PATCH 5/7] x86: Syscall hooks for " Frederic Weisbecker
2012-06-13 16:19 ` [PATCH 6/7] x86: Add adaptive tickless hooks on do_notify_resume() Frederic Weisbecker
2012-06-13 16:19 ` [PATCH 7/7] x86: Exception hooks for adaptive tickless Frederic Weisbecker
2012-06-13 16:35 ` [RFC GIT PULL] nohz: Basic cputime accounting " Frederic Weisbecker
2012-06-14  9:07 ` Peter Zijlstra
2012-06-14  9:10   ` Peter Zijlstra
2012-06-14 11:12   ` Frederic Weisbecker
2012-06-14 11:16     ` Ingo Molnar
2012-06-14 11:21       ` Thomas Gleixner
2012-06-14 11:22         ` Frederic Weisbecker
2012-06-14 12:48           ` Martin Schwidefsky
2012-06-14 13:04             ` Frederic Weisbecker
2012-06-14 14:36               ` Ingo Molnar [this message]
2012-06-14 17:34                 ` Frederic Weisbecker
2012-06-15 12:13                   ` Ingo Molnar
2012-06-14 13:42             ` Frederic Weisbecker
2012-06-14 15:18               ` Martin Schwidefsky
2012-06-15 17:37                 ` Frederic Weisbecker
2012-06-18 10:46                   ` Martin Schwidefsky

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