[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimiz
From: |
Roman Kagan |
Subject: |
Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization |
Date: |
Wed, 9 Mar 2016 20:04:39 +0300 |
User-agent: |
Mutt/1.5.24 (2015-08-30) |
On Wed, Mar 09, 2016 at 05:41:39PM +0200, Michael S. Tsirkin wrote:
> On Wed, Mar 09, 2016 at 05:28:54PM +0300, Roman Kagan wrote:
> > For (1) I've been trying to make a point that skipping clean pages is
> > much more likely to result in noticable benefit than free pages only.
>
> I guess when you say clean you mean zero?
No I meant clean, i.e. those that could be evicted from RAM without
causing I/O.
> Yea. In fact, one can zero out any number of pages
> quickly by putting them in balloon and immediately
> taking them out.
>
> Access will fault a zero page in, then COW kicks in.
I must be missing something obvious, but how is that different from
inflating and then immediately deflating the balloon?
> We could have a new zero VQ (or some other option)
> to pass these pages guest to host, but this only
> works well if page size matches the host page size.
I'm afraid I don't yet understand what kind of pages that would be and
how they are different from ballooned pages.
I still tend to think that ballooning is a sensible solution to the
problem at hand; it's just the granularity that makes things slow and
stands in the way.
Roman.
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, (continued)
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Li, Liang Z, 2016/03/04
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Michael S. Tsirkin, 2016/03/05
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Li, Liang Z, 2016/03/07
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Michael S. Tsirkin, 2016/03/07
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Li, Liang Z, 2016/03/07
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Roman Kagan, 2016/03/09
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Li, Liang Z, 2016/03/09
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Michael S. Tsirkin, 2016/03/09
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Li, Liang Z, 2016/03/09
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Michael S. Tsirkin, 2016/03/09
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization,
Roman Kagan <=
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Michael S. Tsirkin, 2016/03/09
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Roman Kagan, 2016/03/10
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Rik van Riel, 2016/03/09
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Roman Kagan, 2016/03/10
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Paolo Bonzini, 2016/03/04
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Dr. David Alan Gilbert, 2016/03/04
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Li, Liang Z, 2016/03/07
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Roman Kagan, 2016/03/09
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Li, Liang Z, 2016/03/09
- Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization, Li, Liang Z, 2016/03/09