| Message ID | 20200709020629.91671-1-justin.he@arm.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | Fix and enable pmem as RAM device on arm64 | expand |
On Wed, Jul 8, 2020 at 7:06 PM Jia He <justin.he@arm.com> wrote: > > This fixies a few issues when I tried to enable pmem as RAM device on arm64. What NVDIMM bus driver is being used in this case? The ACPI NFIT driver? I'm just looking to see if currently deployed phys_to_target_node() is sufficient, or if this is coming in a new driver?
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: v3: - introduce general version memory_add_physaddr_to_nid, refine the arch specific one - fix an uninitialization bug in v2 device-dax patch v2: https://lkml.org/lkml/2020/7/7/71 - Drop unnecessary patch to harden try_offline_node - Use new solution(by David) to fix dev->target_node=-1 during probing - Refine the mem_hotplug_begin/done patch v1: https://lkml.org/lkml/2020/7/5/381 Jia He (6): mm/memory_hotplug: introduce default dummy memory_add_physaddr_to_nid() arm64/mm: use default dummy memory_add_physaddr_to_nid() sh/mm: use default dummy memory_add_physaddr_to_nid() mm: don't export memory_add_physaddr_to_nid in arch specific directory device-dax: use fallback nid when numa_node is invalid mm/memory_hotplug: fix unpaired mem_hotplug_begin/done arch/arm64/mm/numa.c | 10 ---------- arch/ia64/mm/numa.c | 2 -- arch/sh/mm/init.c | 9 --------- arch/x86/mm/numa.c | 1 - drivers/dax/kmem.c | 21 +++++++++++++-------- mm/memory_hotplug.c | 15 ++++++++++++--- 6 files changed, 25 insertions(+), 33 deletions(-)