On Tue, 17 May 2011, Bastian Blank <wa...@debian.org> wrote:
> On Mon, May 16, 2011 at 11:42:52PM +1000, Russell Coker wrote:
> > > In general there is no requirement to reuse the dom0 kernel as your
> > > domU kernel, although I appreciate that some hosting providers may add
> > > that sort of requirement (or a similar requirement to use one of a
> > > blessed set of kernels).
> > 
> > http://wiki.xensource.com/xenwiki/XenDom0Kernels
> > The above URL describes the requirements for kernels.  A pvops Xen Linux
> > kernel (EG the one from Squeeze) requires at least Xen 4.0.
> 
> Please stop spreading fud.

http://en.wikipedia.org/wiki/Fear,_uncertainty_and_doubt

Please read the above Wikipedia page.  You will find nothing in that page to 
describe observing a product to not work, reading documentation that appears 
to explain why it doesn't work, and telling others.

> > have version 3.1.2 of the Xen kernel and thus won't boot a Squeeze
> > kernel.
> 
> And the error may be what?

I've just tested it again and it works.  I didn't make a record of what the 
error was, Xen just didn't seem to like the kernel and it aborted early in the 
DomU creation process.

Back to the main topic, there are always reasons for not using a particular 
kernel.  RHEL5 had Ext4 support when Lenny had Ext4dev, I guess I could have 
enabled Ext4dev on my Lenny systems that needed something better than Ext3 but 
it seemed like a safer bet to use the RHEL5 kernel.

Finally sometimes kernels just crash for no reason that's easy to debug.  Sure 
it would be nice to be able to devote a lot of time to determining the cause 
and making a good bug report, but when a system that has been running reliably 
for years fails after an upgrade it's a lot easier to just keep using the old 
kernel.

We support things like running an AMD64 kernel with i386 user-space.  It would 
be nice if we could support a Lenny kernel with Squeeze user-space for as long 
as Lenny is supported.

-- 
My Main Blog         http://etbe.coker.com.au/
My Documents Blog    http://doc.coker.com.au/


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