Comments about implementing kprobes with Xen paravirtualization kernels

[William Cohen]

Jim Keniston wrote:
> On Thu, 2005-12-01 at 09:35, William Cohen wrote:
> 
>>Talked with Stephen Tweedie about kprobes in Xen...
>>...
>>Need a list of all the patches used to implement kprobes in the
>>kernel.
> 
> 
> Patches against which kernel?

This would be any kprobe related patch after the corresponding xen files 
was cloned (and mutated) from the original kernel file.

As far as what redhat is currently using. Looking at 
http://download.fedora.redhat.com/pub/fedora/linux/core/development/SRPMS/

Currently generates the xen kernels from:
kernel-xen-2.6.12-1.13_FC5.src.rpm

The base kernels are generated from:

kernel-2.6.14-1.1735_FC5.src.rpm

> 
> 
>>For this the related xen arch files could be generated and
>>this could be used as a starting point. Otherwise it is going to be
>>painful manual process to create the equivalent kprobes patch for Xen.
>>However, once there is a patch, Stephen thought it was quite likely
>>that the xensource people would be willing to accept it.
>>
>>One open question was whether Xen allows the text of the kernel to be
>>modified.
> 
> 
> Dan Stekloff posed this question on the Xen IRC, and the answer was yes,
> a guest kernel can modify its text.

Good, so that is not an issue.

-Will