From: Avi Kivity <avi@qumranet.com>
To: Jeff Dike <jdike@addtoit.com>
Cc: Shaohua Li <shaohua.li@intel.com>,
kvm-devel <kvm-devel@lists.sourceforge.net>,
lkml <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>
Subject: Re: [RFC 0/8]KVM: swap out guest pages
Date: Tue, 24 Jul 2007 08:22:53 +0300 [thread overview]
Message-ID: <46A58CAD.7070807@qumranet.com> (raw)
In-Reply-To: <20070723200659.GA13508@c2.user-mode-linux.org>
Jeff Dike wrote:
> On Mon, Jul 23, 2007 at 01:27:40PM +0300, Avi Kivity wrote:
>
>> Having an address_space (like your patch does) is remarkably simple, and
>> requires few hooks from the current vm. However using existing vmas
>> mapped by the user has many advantages:
>>
>
> It's also needed for a SKAS-like UML client, where the host side will
> need to make system calls on behalf of the guest.
>
>
Even in the current model, guest physical memory is mmap()ed into host
userspace. The kernel cannot enforce this, however.
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
WARNING: multiple messages have this Message-ID (diff)
From: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
To: Jeff Dike <jdike-OPE4K8JWMJJBDgjK7y7TUQ@public.gmane.org>
Cc: kvm-devel
<kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>,
lkml <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [RFC 0/8]KVM: swap out guest pages
Date: Tue, 24 Jul 2007 08:22:53 +0300 [thread overview]
Message-ID: <46A58CAD.7070807@qumranet.com> (raw)
In-Reply-To: <20070723200659.GA13508-1LLyehjZOUUZWFFyALql+T+iFHGzDt/a@public.gmane.org>
Jeff Dike wrote:
> On Mon, Jul 23, 2007 at 01:27:40PM +0300, Avi Kivity wrote:
>
>> Having an address_space (like your patch does) is remarkably simple, and
>> requires few hooks from the current vm. However using existing vmas
>> mapped by the user has many advantages:
>>
>
> It's also needed for a SKAS-like UML client, where the host side will
> need to make system calls on behalf of the guest.
>
>
Even in the current model, guest physical memory is mmap()ed into host
userspace. The kernel cannot enforce this, however.
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
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next prev parent reply other threads:[~2007-07-24 5:23 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-23 6:51 [RFC 0/8]KVM: swap out guest pages Shaohua Li
2007-07-23 6:51 ` Shaohua Li
2007-07-23 10:27 ` Avi Kivity
2007-07-23 10:27 ` Avi Kivity
2007-07-23 12:25 ` [kvm-devel] " Christoph Hellwig
2007-07-23 12:25 ` Christoph Hellwig
2007-07-23 12:29 ` [kvm-devel] " Avi Kivity
2007-07-23 12:29 ` Avi Kivity
2007-07-23 12:34 ` [kvm-devel] " Christoph Hellwig
2007-07-23 12:34 ` Christoph Hellwig
2007-07-23 12:39 ` [kvm-devel] " Avi Kivity
2007-07-23 12:39 ` Avi Kivity
2007-07-24 2:00 ` [kvm-devel] " Shaohua Li
2007-07-24 2:00 ` Shaohua Li
2007-07-23 20:06 ` Jeff Dike
2007-07-23 20:06 ` Jeff Dike
2007-07-24 5:22 ` Avi Kivity [this message]
2007-07-24 5:22 ` Avi Kivity
2007-07-25 16:15 ` Jeff Dike
2007-07-25 16:15 ` Jeff Dike
2007-07-25 17:12 ` [kvm-devel] " Carsten Otte
2007-07-25 17:12 ` Carsten Otte
2007-07-23 23:10 ` [kvm-devel] " Rusty Russell
2007-07-23 23:10 ` Rusty Russell
2007-07-24 5:30 ` [kvm-devel] " Avi Kivity
2007-07-24 6:11 ` Rusty Russell
2007-07-24 6:11 ` Rusty Russell
2007-07-24 6:21 ` [kvm-devel] " Avi Kivity
2007-07-24 6:21 ` Avi Kivity
2007-07-24 6:45 ` [kvm-devel] " Rusty Russell
2007-07-24 6:45 ` Rusty Russell
2007-07-24 6:59 ` [kvm-devel] " Avi Kivity
2007-07-24 6:59 ` Avi Kivity
2007-07-24 7:17 ` [kvm-devel] " Rusty Russell
2007-07-24 7:17 ` Rusty Russell
2007-07-24 1:42 ` Shaohua Li
2007-07-24 1:42 ` Shaohua Li
2007-07-24 5:42 ` Avi Kivity
2007-07-24 5:42 ` Avi Kivity
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