linux-kernel - Re: [PATCH 06/19] x86, mm: setup page table in top-down

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Date:	Wed, 24 Oct 2012 11:55:13 +0100
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Stefano Stabellini <Stefano.Stabellini@...citrix.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Jacob Shin <jacob.shin@....com>, Tejun Heo <tj@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 06/19] x86, mm: setup page table in top-down

On Tue, 23 Oct 2012, Yinghai Lu wrote:
> On Tue, Oct 23, 2012 at 5:22 AM, Stefano Stabellini
> <stefano.stabellini@...citrix.com> wrote:
> > On Mon, 22 Oct 2012, Yinghai Lu wrote:
> >> Can you test domU 32bit too?
> >> I did not test that, and looks like Jacob only test 64 bit domU too.
> >
> > Sure. It works fine.
> 
> great.
> 
> Do you know any simple way to test xen domU after pxe booting xen/dom0 via pxe?
> 
> >From kvm, it is simple with pxe:
> 1. build kernel and iso at the same time., initrd is converted from
> opensuse rescue initramfs.
> 2. copy kernel and iso into boot server
> 3. network boot the kernel
> 4. mount nfs dir so could access iso, and qemu-kvm.
> 5. qemu-kvm to load the iso.

After building and installing the Xen tools in Dom0 (basically
everything that comes out a xen-unstable build), you can use "xl" to
create VMs:

1) build and install xen and tools in dom0 (make; make install)
If you are running dom0 out of his initramfs you might have to add them to it.
But I guess that you can also make them available to your dom0 via nfs
share.

2) copy your domU kernel and initrd to dom0

3) Write a simple config file in dom0 with the path to the kernel and initrd

name = "linux"
kernel = "/path/to/vmlinuz"
ramdisk = "/path/to/initrd"
memory = 1024
vcpus = 4
vif = [ 'bridge=xenbr0' ]
disk = [ '/path/to/debian_squeeze_amd64_standard.raw,raw,xvda,w' ]
extra = 'textmode=1 xencons=xvc0'
root = "/dev/xvda1"

4) create the VM
xl create -c /path/to/config_file


As an alternative you can get an account on Amazon EC2 for few cents per
hour and test your kernel over there ;)
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