lpar issue for ZONE_DEVICE p2pmem in 4.14-rc

[Stephen Bates]

> [    3.537780] lpar: Attempting to resize HPT to shift 21
> [    3.539251] Unable to resize hash page table to target order 21: -1
> [    3.541079] Unable to create mapping for hot added memory 0xc000210000000000..0xc000210004000000: -2

> For #1 above please check if your qemu supports H_RESIZE_HPT_* hcalls? 

Balbir do you have any suggestions as to how to test for this support? Note I am running this on my x86_64 host so there is no virtualization hardware in my QEMU. My qemu is very recent (QEMU emulator version 2.10.50 (v2.10.0-1026-gd8f932c-dirty)).

> For create mapping failures, the rc is -ENOENT. Can you help debug this further? We could do hcall tracing or enable debugging.

Sure I can help debug. My original email also had all you needed to recreate this issue so that’s an option too?

Stephen