On Fri, May 14, 2010 at 12:24:02AM +0800, lei yang wrote:
> On Fri, May 14, 2010 at 12:17 AM, Pasi Kärkkäinen <[1]pasik@xxxxxx> wrote:
>
> On Fri, May 14, 2010 at 12:10:28AM +0800, lei yang wrote:
> > On Thu, May 13, 2010 at 11:53 PM, Pasi Kärkkäinen
> <[1][2]pasik@xxxxxx> wrote:
> >
> > On Thu, May 13, 2010 at 11:47:03PM +0800, lei yang wrote:
> > > On Thu, May 13, 2010 at 8:33 PM, Pasi Kärkkäinen
> > <[1][2][3]pasik@xxxxxx> wrote:
> > >
> > > On Thu, May 13, 2010 at 11:13:00AM +0800, lei yang wrote:
> > > > Hi All,
> > > >
> > > > I download a xen 4.0.0, after I run "make world" I
> got a
> > 2.6.33.1
> > > kernel,
> > > > it should be a kernel for Dom0, my question is " how
> to get
> > a domU
> > > kernel
> > > > for 2.6.33.1"
> > > >
> > >
> > > The same kernel can be used also for domU.
> > >
> > >
> > > a.I'm confused by this in the readme of xen4.0.0, I saw we
> can get
> > domU
> > > with " KERNELS="linux-2.6-xen0 linux-2.6-xenU"" when run
> "make",
> > and I
> > > got two kernel one is for dom0, anther is domU, the size of
> dom0 is
> > bigger
> > > than domU, do you mean we can ignor
> this(KERNELS="linux-2.6-xen0
> > > linux-2.6-xenU), just use one dom0 kernel for domU?
> > >
> >
> > Those options are required for building the linux-2.6.18-xen
> based "old"
> > xenlinux kernels.
> > If you don't specify KERNELS= at all, and only use "make world",
> it'll
> > build you a pvops kernel.
> > > b. if I saw some document, they tell "the dom0 need the
> patch for
> > xen "
> > > eg:wget
> > >
> >
>
> [2][3][4]http://gentoo-xen-kernel.googlecode.com/files/xen-patches-2.6.33-1.tar.bz2
> > > , my question is "does domU kernel need this patch?
> > >
> >
> > If you want to build a Xenlinux based domU kernel, then you need
> that
> > patch.
> > pvops kernels don't require that patch.
> >
> > See [4][5]http://wiki.xensource.com/xenwiki/XenDom0Kernels for
> more
> > information.
> > That says Dom0Kernels, but it also applies for domU kernels.
> >
> >
> > do you mean the Dom0 kernel *image* can be used for DomU? one quick
> > quesion here"
> > dom0 enabled CONFIG_XEN_DOM0=y , if we use dom0 kernel image for
> domU, do
> > we need to disable this CONFIG_XEN_DOM0
> >
>
> The exact same built binary *image* can be used for dom0 and domU.
>
> When booting the same image as domU it won't have access to any of the
> privileged (dom0) things, so having the CONFIG_XEN_DOM0 enabled doesn't
> matter.
>
>
>
> It seems the patch for dom0 doesn't affect domU boot when use dom0 kernel
> for domU.
> domU doesn't need that patch.
>
I'm not sure which patch you're talking about here..
Anyway, upstream kernel.org kernels run as Xen PV guests without any additional
patches, using the Linux pvops framework.
-- Pasi
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