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* [PATCH v2 0/7] mm/hotplug: Only use subsection map in VMEMMAP case
@ 2020-02-20  4:33 Baoquan He
  2020-02-20  4:33 ` [PATCH v2 1/7] mm/hotplug: fix hot remove failure in SPARSEMEM|!VMEMMAP case Baoquan He
                   ` (7 more replies)
  0 siblings, 8 replies; 45+ messages in thread
From: Baoquan He @ 2020-02-20  4:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: linux-mm, akpm, richardw.yang, david, osalvador, dan.j.williams,
	mhocko, bhe, rppt, robin.murphy

Memory sub-section hotplug was added to fix the issue that nvdimm could
be mapped at non-section aligned starting address. A subsection map is
added into struct mem_section_usage to implement it. However, sub-section
is only supported in VMEMMAP case. Hence there's no need to operate
subsection map in SPARSEMEM|!VMEMMAP case. In this patchset, change
codes to make sub-section map and the relevant operation only available
in VMEMMAP case.

And since sub-section hotplug added, the hot add/remove functionality
have been broken in SPARSEMEM|!VMEMMAP case. Wei Yang and I, each of us
make one patch to fix one of the failures. In this patchset, the patch
1/7 from me is used to fix the hot remove failure. Wei Yang's patch has
been merged by Andrew. 

Changelog:
v1->v2:
  Move the hot remove fixing patch to the front so that people can 
  back port it to easier. Suggested by David.

  Split the old patch which invalidate the sub-section map in
  !VMEMMAP case into two patches, patch 4/7, and patch 6/7. This
  makes patch reviewing easier. David by David.

  Take Wei Yang's fixing patch out to post alone, since it has been
  reviewed and acked by people. Suggested by Andrew.

  Fix a code comment mistake in the current patch 2/7. Found out by
  Wei Yang during reviewing.

Baoquan He (7):
  mm/hotplug: fix hot remove failure in SPARSEMEM|!VMEMMAP case
  mm/sparse.c: introduce new function fill_subsection_map()
  mm/sparse.c: introduce a new function clear_subsection_map()
  mm/sparse.c: only use subsection map in VMEMMAP case
  mm/sparse.c: add code comment about sub-section hotplug
  mm/sparse.c: move subsection_map related codes together
  mm/sparse.c: Use __get_free_pages() instead in
    populate_section_memmap()

 include/linux/mmzone.h |   2 +
 mm/sparse.c            | 178 +++++++++++++++++++++++++++++------------
 2 files changed, 127 insertions(+), 53 deletions(-)

-- 
2.17.2



^ permalink raw reply	[flat|nested] 45+ messages in thread

end of thread, other threads:[~2020-03-03  8:39 UTC | newest]

Thread overview: 45+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-02-20  4:33 [PATCH v2 0/7] mm/hotplug: Only use subsection map in VMEMMAP case Baoquan He
2020-02-20  4:33 ` [PATCH v2 1/7] mm/hotplug: fix hot remove failure in SPARSEMEM|!VMEMMAP case Baoquan He
2020-02-20  6:11   ` Wei Yang
2020-02-20 12:07   ` David Hildenbrand
2020-02-26 12:31   ` David Hildenbrand
2020-02-26 13:07     ` Baoquan He
2020-02-26 18:09   ` Dan Williams
2020-03-03  8:34   ` David Hildenbrand
2020-03-03  8:39     ` Baoquan He
2020-02-20  4:33 ` [PATCH v2 2/7] mm/sparse.c: introduce new function fill_subsection_map() Baoquan He
2020-02-20  6:14   ` Wei Yang
2020-02-28 14:27   ` David Hildenbrand
2020-03-01  4:59     ` Baoquan He
2020-02-20  4:33 ` [PATCH v2 3/7] mm/sparse.c: introduce a new function clear_subsection_map() Baoquan He
2020-02-20  6:15   ` Wei Yang
2020-02-28 14:36   ` David Hildenbrand
2020-03-01  5:20     ` Baoquan He
2020-03-02 15:43       ` David Hildenbrand
2020-03-03  1:53         ` Baoquan He
2020-03-03  8:22         ` Baoquan He
2020-03-03  8:33           ` David Hildenbrand
2020-03-03  8:38             ` Baoquan He
2020-02-20  4:33 ` [PATCH v2 4/7] mm/sparse.c: only use subsection map in VMEMMAP case Baoquan He
2020-02-20  6:17   ` Wei Yang
2020-02-25  9:57   ` Michal Hocko
2020-02-26  3:53     ` Baoquan He
2020-02-26  9:10       ` Michal Hocko
2020-02-28  7:25         ` Baoquan He
2020-02-20  4:33 ` [PATCH v2 5/7] mm/sparse.c: add code comment about sub-section hotplug Baoquan He
2020-02-20  4:33 ` [PATCH v2 6/7] mm/sparse.c: move subsection_map related codes together Baoquan He
2020-02-20  6:18   ` Wei Yang
2020-02-20  7:04     ` Baoquan He
2020-02-20  7:12       ` Wei Yang
2020-02-20  8:55         ` Baoquan He
2020-02-20 21:52           ` Wei Yang
2020-02-20  4:33 ` [PATCH v2 7/7] mm/sparse.c: Use __get_free_pages() instead in populate_section_memmap() Baoquan He
2020-02-20 10:38 ` [PATCH v2 0/7] mm/hotplug: Only use subsection map in VMEMMAP case Michal Hocko
2020-02-21 14:28   ` Baoquan He
2020-02-25  9:10     ` David Hildenbrand
2020-02-25 10:02       ` Michal Hocko
2020-02-26  3:42         ` Baoquan He
2020-02-26  9:14           ` Michal Hocko
2020-02-26 12:30             ` Baoquan He
2020-02-25 10:03     ` Michal Hocko
2020-02-26  3:44       ` Baoquan He

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