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* [PATCH v3 0/6] Fix and enable pmem as RAM device on arm64
@ 2020-07-09  2:06 Jia He
  2020-07-09  2:06 ` [PATCH v3 1/6] mm/memory_hotplug: introduce default dummy memory_add_physaddr_to_nid() Jia He
                   ` (6 more replies)
  0 siblings, 7 replies; 21+ messages in thread
From: Jia He @ 2020-07-09  2:06 UTC (permalink / raw)
  To: Catalin Marinas, Will Deacon, Tony Luck, Fenghua Yu,
	Yoshinori Sato, Rich Felker, Dave Hansen, Andy Lutomirski,
	Peter Zijlstra, Thomas Gleixner, Ingo Molnar, Borislav Petkov,
	David Hildenbrand
  Cc: Kaly Xin, Michal Hocko, Dave Jiang, Baoquan He, linux-sh,
	Vishal Verma, Masahiro Yamada, x86, Chuhong Yuan, linux-kernel,
	Mike Rapoport, linux-mm, linux-nvdimm, Jonathan Cameron,
	H. Peter Anvin, linux-ia64, Dan Williams, Logan Gunthorpe,
	Andrew Morton, linux-arm-kernel, Jia He

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(-)

-- 
2.17.1


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^ permalink raw reply	[flat|nested] 21+ messages in thread

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Thread overview: 21+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-07-09  2:06 [PATCH v3 0/6] Fix and enable pmem as RAM device on arm64 Jia He
2020-07-09  2:06 ` [PATCH v3 1/6] mm/memory_hotplug: introduce default dummy memory_add_physaddr_to_nid() Jia He
2020-07-09  9:10   ` David Hildenbrand
2020-07-09  2:06 ` [PATCH v3 2/6] arm64/mm: use " Jia He
2020-07-09  9:10   ` David Hildenbrand
2020-07-09  2:06 ` [PATCH v3 3/6] sh/mm: " Jia He
2020-07-09  9:10   ` David Hildenbrand
2020-07-20 21:39     ` Rich Felker
2020-07-21  3:23   ` Pankaj Gupta
2020-07-09  2:06 ` [PATCH v3 4/6] mm: don't export memory_add_physaddr_to_nid in arch specific directory Jia He
2020-07-09  2:11   ` Matthew Wilcox
2020-07-09  2:16     ` Justin He
2020-07-09  9:18     ` Mike Rapoport
2020-07-09  9:18       ` David Hildenbrand
2020-07-09  9:36         ` Justin He
2020-07-09  2:06 ` [PATCH v3 5/6] device-dax: use fallback nid when numa_node is invalid Jia He
2020-07-09  3:38   ` Dan Williams
2020-07-09  5:13     ` Justin He
2020-07-09  2:06 ` [PATCH v3 6/6] mm/memory_hotplug: fix unpaired mem_hotplug_begin/done Jia He
2020-07-09  9:11   ` David Hildenbrand
2020-07-31 15:28 ` [PATCH v3 0/6] Fix and enable pmem as RAM device on arm64 Dan Williams

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