On Fri, Oct 31, 2014 at 03:41:34PM -0400, Dan Streetman wrote: > In powerpc pseries platform dlpar operations, Use device_online() and > device_offline() instead of cpu_up() and cpu_down(). > > Calling cpu_up/down directly does not update the cpu device offline > field, which is used to online/offline a cpu from sysfs. Calling > device_online/offline instead keeps the sysfs cpu online value correct. > The hotplug lock, which is required to be held when calling > device_online/offline, is already held when dlpar_online/offline_cpu > are called, since they are called only from cpu_probe|release_store. > > This patch fixes errors on PowerVM systems that have cpu(s) added/removed > using dlpar operations; without this patch, the > /sys/devices/system/cpu/cpuN/online nodes do not correctly show the > online state of added/removed cpus.
Verified the patch to be working as expected when I online and offline CPUs of a PowerKVM guest using QEMU (plus my RFC hotplug patchset for QEMU) Regards, Bharata. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
