From: Avi Kivity <avi@redhat.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>,
LKML <linux-kernel@vger.kernel.org>,
kvm@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
Fr??d??ric Weisbecker <fweisbec@gmail.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Cyrill Gorcunov <gorcunov@gmail.com>,
Lin Ming <ming.m.lin@intel.com>,
Sheng Yang <sheng@linux.intel.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
oerg Roedel <joro@8bytes.org>,
Jes Sorensen <Jes.Sorensen@redhat.com>,
Gleb Natapov <gleb@redhat.com>,
Zachary Amsden <zamsden@redhat.com>,
zhiteng.huang@intel.com, tim.c.chen@intel.com
Subject: Re: [RFC] para virt interface of perf to support kvm guest os statistics collection in guest os
Date: Wed, 09 Jun 2010 14:12:47 +0300 [thread overview]
Message-ID: <4C0F772F.6090206@redhat.com> (raw)
In-Reply-To: <1276078122.2046.1227.camel@twins>
On 06/09/2010 01:08 PM, Peter Zijlstra wrote:
> On Wed, 2010-06-09 at 12:41 +0300, Avi Kivity wrote:
>
>>
>>>> Disabling the watchdog is unfortunate. Why is it necessary?
>>>>
>>>>
>>> perf always uses NMI, so we disable the nmi_watchdog when a perf_event is
>>> set up in case they might have impact.
>>>
>>>
>> Ok. Is that the case for the hardware pmus as well? If so it might be
>> done in common code.
>>
> The x86 hardware pmu implementation disables the lapic watchdog too, but
> recent kernels come with a watchdog implementation on top of perf, the
> old lapic one will be depricated.
>
So this should indeed be in common code, and removed (for all pmus) when
the new watchdog is merged in 2.6.36.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2010-06-09 11:13 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-09 3:30 [RFC] para virt interface of perf to support kvm guest os statistics collection in guest os Zhang, Yanmin
2010-06-09 8:33 ` Avi Kivity
2010-06-09 9:21 ` Zhang, Yanmin
2010-06-09 9:41 ` Avi Kivity
2010-06-09 10:08 ` Peter Zijlstra
2010-06-09 10:27 ` Ingo Molnar
2010-06-09 11:12 ` Avi Kivity [this message]
2010-06-10 2:21 ` Zhang, Yanmin
2010-06-10 3:06 ` Avi Kivity
2010-06-10 5:13 ` Zhang, Yanmin
2010-06-10 9:50 ` Peter Zijlstra
2010-06-11 2:11 ` Zhang, Yanmin
2010-06-09 8:59 ` Avi Kivity
2010-06-09 9:30 ` Zhang, Yanmin
2010-06-09 9:46 ` Avi Kivity
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