Messages in this thread | | | Date | Sat, 21 Mar 2009 17:44:31 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH 2/3] utrace core |
| |
* Renzo Davoli <renzo@cs.unibo.it> wrote:
> On Sat, Mar 21, 2009 at 03:34:57PM +0100, Ingo Molnar wrote: > > > > * Renzo Davoli <renzo@cs.unibo.it> wrote: > > > > > Tracing does not mean only debug. Some tracing facilities can be > > > used for virtualization. For example User-Mode Linux is based on > > > ptrace. > > > > > > I have a prototype of kernel module for virtualization (kmview) > > > based on utrace. [...] > > > > Hm, i cannot find the source code. Can it be downloaded from > > somewhere? > > Sure! kmview is not included in our Debian packages yet as it > relies on (still) non mainstream features (utrace), but the code > is available on our view-os svn repository. > > Check out: > svn co https://view-os.svn.sourceforge.net/svnroot/view-os view-os > > More specifically to browse the code/specifications: > The kmview device protocol is here: > http://wiki.virtualsquare.org/index.php/KMview_module_interface_specifications > The kernel module itself is here: > http://view-os.svn.sourceforge.net/viewvc/view-os/trunk/kmview-kernel-module/
Looks really interesting.
That's btw. what i see as the biggest value of utrace: it's a comprehesive, all-encompassing framework all around process state events and process state manipulation.
Utrace came from Frysk (generic debugger), but the fact that you were able to build a completely unanticipated usecase and virtualization module on top of it is a very good sign of a robust and complete design. I'm impressed.
Ingo
| |