On Tue, 2015-10-27 at 13:27 -0500, Nathan Fontenot wrote: > Add the ability to hotplug add cpus via rtas hotplug events by either > specifying the drc index of the CPU to add, or providing a count of the > number of CPUs to add.
So I just tried running this on my system, without doing anything on the HMC. I have: # lsprop /proc/device-tree/cpus/ibm,drc-indexes /proc/device-tree/cpus/ibm,drc-indexes 00000002 10000000 10000002 So I think that says I have two cpus. The first one is already added: /proc/device-tree/cpus/PowerPC,POWER6@0/ibm,my-drc-index 10000000 (268435456) But can I add the second one? # echo "cpu add count 1" > dlpar RTAS: event: 34, Type: Platform Error, Severity: 2 pseries-hotplug-cpu: Failed to acquire DRC, rc: -5, drc index: 10000002 pseries-hotplug-cpu: CPU hot-add failed, removing any added CPUs -bash: echo: write error: Invalid argument Seems not. But I'm not clear why? Adding by index doesn't work either: # echo "cpu add index 10000002" > dlpar pseries-hotplug-cpu: Failed to acquire DRC, rc: -1, drc index: 989682 -bash: echo: write error: Invalid argument That's a little confusing, drc index is hex obviously. [root@p6-10-P5-E0 kernel]# echo "cpu add index 0x10000002" > dlpar RTAS: event: 35, Type: Platform Error, Severity: 2 pseries-hotplug-cpu: Failed to acquire DRC, rc: -5, drc index: 10000002 -bash: echo: write error: Invalid argument So that's probably all PEBKAC, but if we can make it more intutive that would be good. cheers _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev