Re: [Powerpc-utils-devel] [PATCH] drmgr: Correct memory affinity when adding memory

[Bharata B R. <bha...@gm...>]

On Thu, May 14, 2015 at 10:03 PM, Nathan Fontenot
<nf...@li...> wrote:
> When adding a LMB we need to update the affinity as part of the add process.
> The affinity for the LMB we are adding is conveyed in the
> ibm,associativity property for the device tree node of the LMB we are adding.
>
> To clarify, a little history. Previously LMB information in the device tree
> was done as a node per LMB in the form memory@XXX, and all of the information
> about the LMB as properties under this node. When we moved to using the
> ibm,dynamic-reconfiguration-memory node to convey LMB information the
> ibm,dynamic-memory property provides an index for each LMB into the
> ibm,associativity-lookup-arrays property. This is where we determine the
> affinity for each LMB.
>
> In order to update the affinity for a LMB we are adding we have to call
> configure connector to get the memory@XXX node and its properties for the
> LMB we are adding (yes, rtas did not change this part), find the
> ibm,associativity property, then find the entry in the associativity
> lookup array that matches it. We then update the ibm,dynamic-memory
> property with the proper index into the associativity lookup array.
>
> Signed-off-by: Nathan Fontenot <nf...@li...>

Tested-by: Bharata B Rao <bh...@li...>

Tested with out of the tree memory hotplug patches in QEMU and now I
am able to hotplug memory to nodes other than node 0.