Re: [XenPPC] Re: Automated reliability report for SMP patch on JS2x

[Maria Butrico <butrico@xxxxxxxxxxxxx>]

Even though I proposed this, I like to withdraw the request.  We have 
identified a machine, a JS20 model 884241X, on which Xen with the SMP 
patch does not boot (Kawachiya-san machine).
It would be useful to know what kind of JS20 blades have successfully 
booted xen with the SMP patch.  In Yorktown we have booted successfully 
only on JS20 model 21X. 

Maria Butrico wrote:
> Jimi, the problem with this approach is that as changes are made to 
> the Xen code, you have no idea if they make the smp situation better 
> or worse.  If you introduce a bug only visible with SMP or more likely 
> to happen running MP you don't find out until someone picks up your 
> code and applies the smp patch.
> Jimi Xenidis wrote:
> > On Oct 3, 2006, at 12:25 PM, Maria Butrico wrote:
> >
> > > What's really interesting to me about this is that the invocation of 
> > > the
> > > icache invalidation did not go in till later.
> > But it did include the I/D cache flush of text.
> > The i-cache invalidate you speak requires the running of DomUs
> >
> > > So if anything we could find
> > > this to be even more reliable one the other changes are also picked up.
> > not much has happened that would effect boot and ssh to dom0
> >
> > > I missed this:  what is transient?
> > >
> > > I would like to suggest that the SMP patch be applied to the base, 
> > > and that
> > > in those case where we known that SMP fails, like on maples,  we use 
> > > the
> > > nosmp option.
> > I'm still not prepared to take the SMP patch, the I-Cache invalidate 
> > fix has improved the situation on maple, but not enough to convince 
> > me that there are no more troubles waiting to pounce.
> > -JX
> >
> >
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>
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