Re: RFC - Approaches to user-space probes

[Prasanna S Panchamukhi]

On Tue, Mar 28, 2006 at 03:35:43PM -0500, Frank Ch. Eigler wrote:
> Prasanna S Panchamukhi <prasanna@xxxxxxxxxx> writes:
> 
> > [...]
> > If the executable is mmaped shared, then those mappings will get written
> > back to the disk.
> > Writting to the disk is not the requirement for user-space probes, it is
> > just the side effect [...]
> 
> It's pretty clear that writing the dirtied pages to disk is an
> *undesirable* side-effect, and should be eliminated.  (Among many
> other scenarios, imagine a kernel shutting down without all the probes
> being cleanly removed.  Then the executables are irretrievably
> corrupted.)

Frank,

What would the tipical situations where the text section in the
executable is mapped with 'MAP_SHARED'?
This information will help solve the problem easily.

Thanks
Prasanna
-- 
Prasanna S Panchamukhi
Linux Technology Center
India Software Labs, IBM Bangalore
Email: prasanna@xxxxxxxxxx
Ph: 91-80-51776329
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