From: Rusty Russell <rusty-8n+1lVoiYb80n/F98K4Iww@public.gmane.org>
To: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
Cc: kvm-devel <kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
Subject: Re: State of current pv_ops backend for KVM?
Date: Wed, 30 May 2007 16:04:28 +1000 [thread overview]
Message-ID: <1180505068.30202.88.camel@localhost.localdomain> (raw)
In-Reply-To: <465D051F.20706-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
On Wed, 2007-05-30 at 08:01 +0300, Avi Kivity wrote:
> Rusty Russell wrote:
> > but it's not clear to me that verifying PTEs is that
> > much faster than shadowing them if you're prepared to be that invasive
> > in the guest anyway.
> >
> This can probably be measured on Xen which can switch from direct to
> shadow mode on runtime.
Sorry, I was a little oblique here. The Xen shadow mode code is aimed
at supporting full virtualization, so it's not really a fair
comparison.
Their direct page access code hooks deep into the guest; the outstanding
question is how efficient would a shadow implementation which made
similar guest changes be?
Unfortunately, there's a lot of coding between here and the answer 8)
Rusty.
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next prev parent reply other threads:[~2007-05-30 6:04 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-29 1:54 State of current pv_ops backend for KVM? Anthony Liguori
[not found] ` <465B87CE.6030801-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-05-29 6:11 ` Ingo Molnar
[not found] ` <20070529061128.GA27037-X9Un+BFzKDI@public.gmane.org>
2007-05-29 6:11 ` Ingo Molnar
2007-05-29 11:47 ` Avi Kivity
[not found] ` <465C12C0.9030906-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-05-29 13:49 ` Anthony Liguori
[not found] ` <465C2F75.3080603-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-05-29 14:00 ` Avi Kivity
[not found] ` <465C31F2.8080007-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-05-29 14:19 ` Anthony Liguori
[not found] ` <465C3671.9000404-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-05-29 14:28 ` Avi Kivity
2007-05-30 2:35 ` Rusty Russell
[not found] ` <1180492544.30202.72.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2007-05-30 5:01 ` Avi Kivity
[not found] ` <465D051F.20706-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-05-30 6:04 ` Rusty Russell [this message]
2007-05-30 2:24 ` Rusty Russell
[not found] ` <1180491861.30202.61.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2007-05-30 2:51 ` Anthony Liguori
[not found] ` <465CE6AD.7000206-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-05-30 18:02 ` Zachary Amsden
[not found] ` <465DBC39.7090308-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org>
2007-05-30 18:20 ` Anthony Liguori
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