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From: Rik van Riel <riel@redhat.com>
To: Glauber Costa <glommer@redhat.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	aliguori@us.ibm.com,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Avi Kivity <avi@redhat.com>
Subject: Re: [PATCH 14/16] KVM-GST: KVM Steal time registration
Date: Mon, 24 Jan 2011 18:31:05 -0500	[thread overview]
Message-ID: <4D3E0BB9.5070805@redhat.com> (raw)
In-Reply-To: <1295892397-11354-15-git-send-email-glommer@redhat.com>

On 01/24/2011 01:06 PM, Glauber Costa wrote:
> Register steal time within KVM. Everytime we sample the steal time
> information, we update a local variable that tells what was the
> last time read. We then account the difference.
>
> Signed-off-by: Glauber Costa<glommer@redhat.com>
> CC: Rik van Riel<riel@redhat.com>
> CC: Jeremy Fitzhardinge<jeremy.fitzhardinge@citrix.com>
> CC: Peter Zijlstra<peterz@infradead.org>
> CC: Avi Kivity<avi@redhat.com>

On second thought - how does this deal with cpu hotplug and
hot unplug?

Do you allocate a new one of these structs every time a cpu
is hot unplugged and then hotplugged, leaking the old one?

Will leaving the old value around confuse the steal time
calculation?

  parent reply	other threads:[~2011-01-24 23:31 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-01-24 18:06 [PATCH 00/16] New Proposal for steal time in KVM Glauber Costa
2011-01-24 18:06 ` [PATCH 01/16] KVM-HDR: register KVM basic header infrastructure Glauber Costa
2011-01-26 11:06   ` Avi Kivity
2011-01-26 12:13     ` Glauber Costa
2011-01-26 15:12       ` Avi Kivity
2011-01-26 15:36         ` Glauber Costa
2011-01-26 17:22           ` Anthony Liguori
2011-01-26 17:49             ` Glauber Costa
2011-01-27 12:31               ` Avi Kivity
2011-01-24 18:06 ` [PATCH 02/16] KVM-HV: KVM - KVM Virtual Memory hypervisor implementation Glauber Costa
2011-01-24 18:06 ` [PATCH 03/16] KVM-HDR: KVM Userspace registering ioctl Glauber Costa
2011-01-26 11:12   ` Avi Kivity
2011-01-26 12:14     ` Glauber Costa
2011-01-26 15:14       ` Avi Kivity
2011-01-26 15:23         ` Glauber Costa
2011-01-24 18:06 ` [PATCH 04/16] KVM-HV: " Glauber Costa
2011-01-24 18:06 ` [PATCH 05/16] KVM-HDR: Implement wallclock over KVM - KVM Virtual Memory Glauber Costa
2011-01-26 11:13   ` Avi Kivity
2011-01-26 12:20     ` Glauber Costa
2011-01-26 15:17       ` Avi Kivity
2011-01-26 15:45         ` Glauber Costa
2011-01-27 12:17           ` Avi Kivity
2011-01-24 18:06 ` [PATCH 06/16] " Glauber Costa
2011-01-24 18:06 ` [PATCH 07/16] KVM-GST: " Glauber Costa
2011-01-24 18:06 ` [PATCH 08/16] KVM-HDR: Implement kvmclock systemtime " Glauber Costa
2011-01-24 18:06 ` [PATCH 09/16] KVM-HV: " Glauber Costa
2011-01-24 18:06 ` [PATCH 10/16] KVM-GST: " Glauber Costa
2011-01-24 18:06 ` [PATCH 11/16] KVM-HDR: KVM Steal time implementation Glauber Costa
2011-01-24 23:06   ` Rik van Riel
2011-01-24 18:06 ` [PATCH 12/16] KVM-HV: " Glauber Costa
2011-01-24 23:15   ` Rik van Riel
2011-01-24 18:06 ` [PATCH 13/16] KVM-HV: KVM Steal time calculation Glauber Costa
2011-01-24 23:20   ` Rik van Riel
2011-01-24 18:06 ` [PATCH 14/16] KVM-GST: KVM Steal time registration Glauber Costa
2011-01-24 23:27   ` Rik van Riel
2011-01-24 23:31   ` Rik van Riel [this message]
2011-01-25  1:25     ` Glauber Costa
2011-01-25  1:26       ` Rik van Riel
2011-01-25  1:28         ` Glauber Costa
2011-01-24 18:06 ` [PATCH 15/16] KVM-GST: KVM Steal time accounting Glauber Costa
2011-01-24 23:33   ` Rik van Riel
2011-01-24 18:06 ` [PATCH 16/16] KVM-GST: adjust scheduler cpu power Glauber Costa
2011-01-24 18:32   ` Peter Zijlstra
2011-01-24 18:51     ` Glauber Costa
2011-01-24 19:51       ` Peter Zijlstra
2011-01-24 19:57         ` Glauber Costa
2011-01-25 20:02         ` Glauber Costa
2011-01-25 20:13           ` Peter Zijlstra
2011-01-25 20:47             ` Glauber Costa
2011-01-25 21:07               ` Peter Zijlstra
2011-01-25 21:27                 ` Glauber Costa
2011-01-26  9:57                   ` Peter Zijlstra
2011-01-26 15:43                     ` Glauber Costa
2011-01-26 16:46                       ` Peter Zijlstra
2011-01-26 16:53                         ` Peter Zijlstra
2011-01-26 18:11                         ` Glauber Costa
2011-01-24 19:53       ` Peter Zijlstra

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