Re: Using the -xen kernel rather than -xen0/U was [Xen-users] Poorhard disk performance on xen-3/dom0

[Anand <xen.mails@xxxxxxxxx>]

Thanks for the reply Ian. Fernando on this list told me about the vifname parameter being excluded from xen 3.0 (doesn't work either when i try to use it inside the config) and was reincluded in unstable, any ideas when it would make it to the stable /rpm.

On 12/31/05, Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx> wrote:

> I used the xen 3.0 rpm's from xensource on centos 4.1, and
> was kind of surprised to see a single kernel. Now seeing
> these posts explains it.
>
> Thanks guys for such a nice job :)
>
> Would love to see more detailed explanation for building the kernel.

The one below is actually pretty good.

> Would you advise to keep using the rpm or compile the kernel
> for production use ?

I see no reason not to use the RPMs. The current plan is to update them
every week or so with just bug fixes, stepping a 4th digit (like Linux).
3.0.0.1 etc.

Ian

>
> On 12/31/05, David H < davidh.davidh@xxxxxxxxx
> <mailto:davidh.davidh@xxxxxxxxx> > wrote:
>
>       >users really should be using the -xen kernel rather
> than -xen0/U.
>
>       This is very good advice, and easy to follow.  If you
> are building Xen
>       for testing or production use the "xen" kenel.  It is
> much more like
>       the kenel in most distributions, everything compiled as
> a module.
>
>       Just edit the top level Makefile so that this line:
>
>       KERNELS ?= linux-2.6-xen0 linux-2.6-xenU
>
>       looks like this
>
>       KERNELS ?= linux-2.6-xen
>
>       You will get a single kernel and modules which can be
> used for both
>       Domain0 and all DomainUs.
>
>       Copy the modules directory  /lib/modules/2.6.whatever-xen to the
>       /lib/modules directory of your VM and make an initrd
> with mkinitrd.
>       You will need to add the initrd to your grub config.
>
>       Takes a little longer to build the kernel this way, but for most
>       people it is much easier to deal with.
>
>       If this is not documented it should be.  I will take a
> look at the
>       wiki over the weekend and add something if it is not
> already there.
>
>       David
>
>
>
>       On 12/30/05, Eric S. Johansson < esj@xxxxxxxxxx> wrote:
>       > Ian Pratt wrote:
>       > > I know everyone always ignores me whenever I say
> this, but users really
>       > > should be using the -xen kernel rather than
> -xen0/U. The latter two are
>       > > just to make build times quicker for developers.
> The -xen kernel has way
>       > > more drivers, though built as modules, so you'll
> need to make an initrd.
>       >
>       >
>       >
> http://www.cl.cam.ac.uk/Research/SRG/netos/xen/readmes/user/us
> er.html#SECTION02140000000000000000
>       >
>       > section 2.4.2 building from source
>       > ---
>       >
>       > unless I'm missing something, the official docs say
> nothing about a -xen
>       > kernel (and modules).  what are more appropriate
> instructions for building?
>       >
>       > --- eric
>       >
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>       >
>
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