[3/3] powerpc/pseries: Cleanup property cloning in memory dlpar

Michael Ellerman mpe at ellerman.id.au
Wed Mar 2 12:47:06 AEDT 2016


On Wed, 2016-03-02 at 10:02 +1100, Michael Ellerman wrote:
> On Wed, 2016-10-02 at 17:13:29 UTC, Nathan Fontenot wrote:
> > Now that the DLPAR add/remove flow updates the ibm,dynamic-memory device
> > tree property each time we add or remove a LMB the work needed to clone
> > this property can be reduced.
> > 
> > Prior to performing any memory DLPAR operation we now clone the device
> > tree property once and convert it to cpu format. This copy is then used
> > to walk through LMBs as we process them and is thrown away when we
> > are finished. There is no longer a need to convert the entire property to
> > cpu format and then back to BE every time we update it, we can just parse
> > it in its native BE format and update the one LMB we need to modify
> > before updating the property.
> > 
> > This patch removes the BE => cpu conversion step in the clone routine and
> > creates a drconf_property_to_cpu() routine to make this conversion for the
> > one time we need to convert the entire property. This then allows us
> > to remove dlpar_update_drconf_property() since we can now do everything
> > in dlpar_update_device_tree_lmb().
> 
> Hi Nathan,
> 
> This sounds like a good cleanup on the face of it.
> 
> But even with it applied I still see a boat load of endian errors from sparse
> in this file. That worries me, can you please try and fix them.

I can merge patches 1 and 2 if you like, and leave this one for you to fixup?
Or I can just wait for a v2 of the whole series. Let me know which you'd
prefer.

cheers



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