[PATCH v4 0/2] Fix and enable pmem as RAM device on arm64

[Dan Williams]

On Thu, Jul 9, 2020 at 8:17 PM Jia He <justin.he at arm.com> wrote:
>
> This fixies a few issues when I tried to enable pmem as RAM device on arm64.
>
> To use memory_add_physaddr_to_nid as a fallback nid, it would be better
> implement a general version (__weak) in mm/memory_hotplug. After that, arm64/
> sh/s390 can simply use the general version, and PowerPC/ia64/x86 will use
> arch specific version.
>
> Tested on ThunderX2 host/qemu "-M virt" guest with a nvdimm device. The
> memblocks from the dax pmem device can be either hot-added or hot-removed
> on arm64 guest. Also passed the compilation test on x86.
>
> Changes:
> v4: - remove "device-dax: use fallback nid when numa_node is invalid", wait
>       for Dan Williams' phys_addr_to_target_node() patch

FWIW, I put these patches through a 0-day run overnight and will be
posting them today.