[...] kprobes [minutes] portion 20060406

[Prasanna S Panchamukhi]

On Thu, Apr 06, 2006 at 05:28:38PM -0400, Frank Ch. Eigler wrote:
> Hi -
> 
> On Thu, Apr 06, 2006 at 02:14:46PM -0700, Hien Q Nguyen wrote:
> > User space probe
> > Prasanna had prototype that execute the handler in the user space [...]
> 
> Beyond merely dispatching, it is important to consider what such a
> handler can do.  Would it still be useful if it cannot call into the
> kernel-side runtime, if it cannot share variables with kernel-space
> probes?

No. The purpose of prototype was to see how it can be implemented.
To my opinion having handler run in user-space does not suit well for
system-wide tracing. But that might be one of the alternative approaches
to per-process tracing, since ptrace is found to have more performance
related problems. 


Thanks
Prasanna
-- 
Thanks & Regards
Prasanna S Panchamukhi
Linux Technology Center
India Software Labs, IBM Bangalore
Email: prasanna@in.ibm.com
Ph: 91-80-51776329