From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <rostedt@goodmis.org>
Received: from hrndva-omtalb.mail.rr.com (hrndva-omtalb.mail.rr.com
 [71.74.56.122]) by ozlabs.org (Postfix) with ESMTP id 3E3D02C0099
 for <linuxppc-dev@lists.ozlabs.org>; Tue, 19 Feb 2013 02:30:26 +1100 (EST)
Message-ID: <1361201422.23152.154.camel@gandalf.local.home>
Subject: Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug
From: Steven Rostedt <rostedt@goodmis.org>
To: Vincent Guittot <vincent.guittot@linaro.org>
Date: Mon, 18 Feb 2013 10:30:22 -0500
In-Reply-To: <CAKfTPtA1aTseD6Gntkf_zbCEbfZzt3P2-P1un6iF5_1TdVLjRQ@mail.gmail.com>
References: <20130122073210.13822.50434.stgit@srivatsabhat.in.ibm.com>
 <510FBC01.2030405@linux.vnet.ibm.com> <87haloiwv0.fsf@rustcorp.com.au>
 <51134596.4080106@linux.vnet.ibm.com>
 <20130208154113.GV17833@n2100.arm.linux.org.uk>
 <51152B81.2050501@linux.vnet.ibm.com> <51153F72.1060005@linux.vnet.ibm.com>
 <CAKfTPtCe+cD7LLkb+D6pqG1SwG2V08ws=4XO3ttHEHV2qgmqPg@mail.gmail.com>
 <5118E2CD.90401@linux.vnet.ibm.com>
 <20130211190852.GA5695@linux.vnet.ibm.com>
 <5119BDFD.1000909@linux.vnet.ibm.com>
 <CAKfTPtAo2hQTfBKTVUuLKgsGJ2ZLD0UTR3fH9UFuJwyFt4n__w@mail.gmail.com>
 <511E8F3C.2010406@linux.vnet.ibm.com>
 <CAKfTPtD=2jn1AVjuhVP1ot7_8x9-W4==hNGZET5N9tRE7gtyMw@mail.gmail.com>
 <512203B3.7090002@linux.vnet.ibm.com> <512207A6.4000402@linux.vnet.ibm.com>
 <CAKfTPtA1aTseD6Gntkf_zbCEbfZzt3P2-P1un6iF5_1TdVLjRQ@mail.gmail.com>
Content-Type: text/plain; charset="ISO-8859-15"
Mime-Version: 1.0
Cc: linux-doc@vger.kernel.org, peterz@infradead.org, fweisbec@gmail.com,
 linux-kernel@vger.kernel.org, walken@google.com, mingo@kernel.org,
 linux-arch@vger.kernel.org, Russell King - ARM Linux <linux@arm.linux.org.uk>,
 xiaoguangrong@linux.vnet.ibm.com, wangyun@linux.vnet.ibm.com,
 paulmck@linux.vnet.ibm.com, nikunj@linux.vnet.ibm.com,
 linux-pm@vger.kernel.org, Rusty Russell <rusty@rustcorp.com.au>, rjw@sisk.pl,
 namhyung@kernel.org, tglx@linutronix.de, linux-arm-kernel@lists.infradead.org,
 netdev@vger.kernel.org, oleg@redhat.com, sbw@mit.edu,
 "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>, tj@kernel.org,
 akpm@linux-foundation.org, linuxppc-dev@lists.ozlabs.org
List-Id: Linux on PowerPC Developers Mail List <linuxppc-dev.lists.ozlabs.org>
List-Unsubscribe: <https://lists.ozlabs.org/options/linuxppc-dev>,
 <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=unsubscribe>
List-Archive: <http://lists.ozlabs.org/pipermail/linuxppc-dev/>
List-Post: <mailto:linuxppc-dev@lists.ozlabs.org>
List-Help: <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=help>
List-Subscribe: <https://lists.ozlabs.org/listinfo/linuxppc-dev>,
 <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=subscribe>

On Mon, 2013-02-18 at 11:58 +0100, Vincent Guittot wrote:

> My tests have been done without cpuidle because i have some issues
> with function tracer and cpuidle
> 
> But the cpu hotplug and cpuidle work well when I run the tests without
> enabling the function tracer
> 

I know suspend and resume has issues with function tracing (because it
makes things like calling smp_processor_id() crash the system), but I'm
unaware of issues with hotplug itself. Could be some of the same issues.

Can you give me more details, I'll try to investigate it.

Thanks,

-- Steve