On 01/29/2016 10:53 AM, David Gibson wrote: > This makes a number of cleanups to handling of mapping failures during > memory hotplug on Power: > > For errors creating the linear mapping for the hot-added region: > * This is now reported with EFAULT which is more appropriate than the > previous EINVAL (the failure is unlikely to be related to the > function's parameters) > * An error in this path now prints a warning message, rather than just > silently failing to add the extra memory. > * Previously a failure here could result in the region being partially > mapped. We now clean up any partial mapping before failing. > > For errors creating the vmemmap for the hot-added region: > * This is now reported with EFAULT instead of causing a BUG() - this > could happen for external reason (e.g. full hash table) so it's better > to handle this non-fatally > * An error message is also printed, so the failure won't be silent > * As above a failure could cause a partially mapped region, we now > clean this up.
Yeah this greatly improves graceful fall back when when memory mapping failure happens at the last level during memory hotplug. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
