[ofa-general] Re: on the coexistance of uDAPLs

[Karl Feind]

On Fri, Apr 13, 2007 at 02:37:52PM -0400, James Lentini wrote:
> 
> 
> On Thu, 12 Apr 2007, Karl Feind wrote:
> 
> > 
> > Hello James,
> > 
> > We are trying to find a way for the OpenIB-cma uDAPL layer to coexist 
> > with SGI's xpmem uDAPL on a single system.   
> > 
> > Obviously, the installation scriptlets for xpmem uDAPL need to 
> > add lines into /etc/dat.conf when xpmem UDAPL is installed.
> > Since a static version of /etc/dat.conf is simply installed
> > when the OpenIB-cma uDAPL layer is installed (via the "dapl"
> > RPM), we are left in the awkward position that later upgrades
> > of OpenIB-cma uDAPL will overwrite the /etc/dat.conf file,
> > removing the other registered uDAPL layers.
> > 
> > Clearly, we need to agree on a conventional way that a uDAPL
> > layer can register itself in /etc/dat.conf when it gets installed and 
> > unregister itself when it gets uninstalled.   Furthermore, upgrading
> > one uDAPL should not have adverse effects on other uDAPLs.  I don't
> > see how this can be done with the current RPM structure.
> > 
> > Thanks for any guidance.
> > 
> > Karl Feind
> > SGI MPI and DAPL Engineering Team
> 
> [adding Arlin Davis to the cc list]
> 
> Karl,
> 
> I agree with you entirely. Clearly the current rpm install/uninstall 
> behavior is incorrect. Do you have patches to address the problem?
> 
> -james

James,

We do not currently have an OFED patch to address this issue.
We'd certainly be interested to hear from anyone who may be working on a 
solution.  

Thanks,
Karl Feind