On 06/21/2017 04:52 AM, Michael Ellerman wrote: > Michael Bringmann <m...@linux.vnet.ibm.com> writes: > >> powerpc/hotplug: On systems like PowerPC which allow 'hot-add' of CPU >> or memory resources, it may occur that the new resources are to be >> inserted into nodes that were not used for these resources at bootup. >> In the kernel, any node that is used must be defined and initialized >> at boot. In order to meet both needs, this patch adds a new kernel >> command line option (numnodes=<int>) for use by the PowerPC architecture- > > Sorry, that's a hack.
It is an intermediate step pending the provision of the firmware properties under discussion that were mentioned by Nathan Fontenot last week. > I thought you were going to use firmware properties to find the set of > possible nodes. Did that not work? Inference based on the current set of firmware properties for associativity is insufficient. That is partly the reason for the properties mentioned by Nathan last week. The current firmware properties only cover what is known at boot time. They do not cover expansions from DLPAR / hot-add operations which can add up to everything else on the system. > cheers Regards, -- Michael W. Bringmann Linux Technology Center IBM Corporation Tie-Line 363-5196 External: (512) 286-5196 Cell: (512) 466-0650 m...@linux.vnet.ibm.com
