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From: Avi Kivity <avi@redhat.com>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Glauber Costa <glommer@gmail.com>,
	qemu-devel@nongnu.org, Gerd Hoffmann <kraxel@redhat.com>,
	Glauber Costa <glommer@redhat.com>,
	kvm-devel <kvm@vger.kernel.org>
Subject: Re: [Qemu-devel] Re: [PATCH 3/3] Add KVM support to QEMU
Date: Wed, 29 Oct 2008 11:54:11 +0200	[thread overview]
Message-ID: <490832C3.4060602@redhat.com> (raw)
In-Reply-To: <4907A1FA.2060106@codemonkey.ws>

Anthony Liguori wrote:
> Another place "hook" is updating a slot's dirty bitmap.  Right now, 
> with my patchset we don't have live migration or the VGA RAM 
> optimization.  There's nothing about the VGA RAM optimization that 
> wouldn't work for QEMU.  I'm not sure that it really is an 
> optimization in the context of TCG, but I certainly don't think it's 
> any worse.  The only thing you really need is to query the KVM dirty 
> bitmap when it comes time to enable start over querying the VGA dirty 
> bits.

I don't understand this.  The VGA optimization really is qemu's, the kvm 
modifications only cater to the different way of getting the dirty bits.

> The same is needed for live migration, so I think what we really need 
> is to change the memory dirty bit tracking API to have a concept of 
> refresh that we can use to hook for KVM.
>

Can you elaborate on this refresh?

-- 
error compiling committee.c: too many arguments to function


WARNING: multiple messages have this Message-ID (diff)
From: Avi Kivity <avi@redhat.com>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Glauber Costa <glommer@gmail.com>,
	Glauber Costa <glommer@redhat.com>,
	qemu-devel@nongnu.org, kvm-devel <kvm@vger.kernel.org>,
	Gerd Hoffmann <kraxel@redhat.com>
Subject: Re: [Qemu-devel] Re: [PATCH 3/3] Add KVM support to QEMU
Date: Wed, 29 Oct 2008 11:54:11 +0200	[thread overview]
Message-ID: <490832C3.4060602@redhat.com> (raw)
In-Reply-To: <4907A1FA.2060106@codemonkey.ws>

Anthony Liguori wrote:
> Another place "hook" is updating a slot's dirty bitmap.  Right now, 
> with my patchset we don't have live migration or the VGA RAM 
> optimization.  There's nothing about the VGA RAM optimization that 
> wouldn't work for QEMU.  I'm not sure that it really is an 
> optimization in the context of TCG, but I certainly don't think it's 
> any worse.  The only thing you really need is to query the KVM dirty 
> bitmap when it comes time to enable start over querying the VGA dirty 
> bits.

I don't understand this.  The VGA optimization really is qemu's, the kvm 
modifications only cater to the different way of getting the dirty bits.

> The same is needed for live migration, so I think what we really need 
> is to change the memory dirty bit tracking API to have a concept of 
> refresh that we can use to hook for KVM.
>

Can you elaborate on this refresh?

-- 
error compiling committee.c: too many arguments to function

  reply	other threads:[~2008-10-29  9:54 UTC|newest]

Thread overview: 63+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-28 20:13 [PATCH 1/3] Add additional CPU flag definitions Anthony Liguori
2008-10-28 20:13 ` [Qemu-devel] " Anthony Liguori
2008-10-28 20:13 ` [PATCH 2/3] Split CPUID from op_helper Anthony Liguori
2008-10-28 20:13   ` [Qemu-devel] " Anthony Liguori
2008-10-28 20:13   ` [PATCH 3/3] Add KVM support to QEMU Anthony Liguori
2008-10-28 20:13     ` [Qemu-devel] " Anthony Liguori
2008-10-28 20:49     ` Hollis Blanchard
2008-10-28 20:49       ` Hollis Blanchard
2008-10-28 20:49       ` Hollis Blanchard
     [not found]       ` <fb412d760810281349q2572acf0j4a3f5eff9e8a55a4-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-10-28 21:10         ` Anthony Liguori
2008-10-28 21:10           ` Anthony Liguori
2008-10-28 21:10           ` Anthony Liguori
2008-10-28 20:57     ` Andreas Färber
2008-10-28 21:04       ` Glauber Costa
2008-10-28 21:16         ` Anthony Liguori
2008-10-28 21:05       ` Anthony Liguori
2008-11-04 13:25         ` Avi Kivity
2008-10-28 21:41     ` Gerd Hoffmann
2008-10-28 21:41       ` [Qemu-devel] " Gerd Hoffmann
2008-10-28 21:51       ` Anthony Liguori
2008-10-28 21:51         ` [Qemu-devel] " Anthony Liguori
2008-10-28 23:04         ` Glauber Costa
2008-10-28 23:04           ` Glauber Costa
2008-10-28 23:36           ` Anthony Liguori
2008-10-28 23:36             ` Anthony Liguori
2008-10-29  9:54             ` Avi Kivity [this message]
2008-10-29  9:54               ` Avi Kivity
2008-10-29 12:35               ` Glauber Costa
2008-10-29 12:35                 ` Glauber Costa
2008-10-29 12:39                 ` Avi Kivity
2008-10-29 12:39                   ` Avi Kivity
2008-10-29 12:56                   ` Glauber Costa
2008-10-29 12:56                     ` Glauber Costa
2008-10-29 13:07               ` Anthony Liguori
2008-10-29 13:07                 ` Anthony Liguori
2008-10-29 13:23                 ` Avi Kivity
2008-10-29 13:23                   ` Avi Kivity
2008-10-29 13:32                   ` Anthony Liguori
2008-10-29 13:32                     ` Anthony Liguori
2008-10-29 13:51             ` Hollis Blanchard
2008-10-29 14:09               ` Avi Kivity
2008-10-29 14:09                 ` Avi Kivity
2008-10-29 14:16                 ` Fabrice Bellard
2008-10-29 14:16                   ` [Qemu-devel] " Fabrice Bellard
2008-10-29 14:23                   ` Anthony Liguori
2008-10-29 19:13                 ` Blue Swirl
2008-10-29 19:13                   ` Blue Swirl
2008-11-01 16:25                   ` Blue Swirl
2008-11-01 16:25                     ` Blue Swirl
2008-10-29 14:58     ` Glauber Costa
2008-10-29 14:58       ` [Qemu-devel] " Glauber Costa
2008-10-29 17:41     ` Glauber Costa
2008-10-29 17:41       ` [Qemu-devel] " Glauber Costa
2008-10-29 19:01       ` Anthony Liguori
2008-10-29 19:01         ` [Qemu-devel] " Anthony Liguori
2008-11-04 13:24     ` Avi Kivity
2008-11-04 13:24       ` [Qemu-devel] " Avi Kivity
2008-11-04 14:02       ` Anthony Liguori
2008-11-04 14:02         ` [Qemu-devel] " Anthony Liguori
2008-11-04 14:46         ` Avi Kivity
2008-11-04 14:46           ` [Qemu-devel] " Avi Kivity
2008-11-04 14:50           ` Anthony Liguori
2008-11-04 14:50             ` [Qemu-devel] " Anthony Liguori

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