[K42-discussion] Re: Possible benefit of running K42 on Cell CBE ...

[Michal Ostrowski]

We'll be updating to 2.6.13 or so.   Newer Linux kernels deprecate
devfs, which k42 currently depends on.  Furthermore, ppc64 arch code has
been merged with ppc to create "powerpc".  This is a fundamentally
invasive change that we don't have the time to track.

-- 
Michal Ostrowski <mostrows at watson.ibm.com>

On Wed, 2006-01-11 at 13:28 -0700, Matthew Barrick wrote:
> On Dec 22, 2005, at 05:02 Jimi Xenidis wrote:
> > If you wanted SPU support then you would have to take the LinuxBPA  
> > changes en-masse and update our k42 to use the newer kernel code.   
> > Linux is a moving target, so _after_ the current update is complete  
> > (which is a background task for us) it may be another few weeks or  few 
> > months.
> > 
> > Another concern is that user apps (the PU component) communicate with  
> > the SPU via Linux sysfs.  K42 does not normally use sysfs, so this  
> > would take a few weeks to get that interchange correct.
> 
> Could we get some more information on the Linux updates that are 
> planned?  In particular what version of Linux will the k42 linux tree be 
> updated to be close to and what sub-systems will be updated/ignored. I 
> understand it's a background task, but if it's possible to get a vague 
> time estimate it'd be appreciated.
> 
> I'm asking because I'm working on getting basic Infiniband support on 
> k42 based the OpenIB project, and lot of their stuff depends on the 
> newer kernel stuff, and it sounds like if someone's working on updating 
> the Linux tree to something more recent, it'd be best to hold off on my 
> work until the update is done.
> 
> Thanks,
> 
> matthew barrick
> barrick at cs.unm.edu
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