This is the backport of the following fixes for 4.19-stable:
- a31b264c2b41 ("mm/memory_hotplug: make
unregister_memory_block_under_nodes() never fail")
-- Turned out to not only be a cleanup but also a fix
- 2c91f8fc6c99 ("mm/memory_hotplug: fix try_offline_node()")
-- Automatic stable backport failed due to missing dependencies.
- feee6b298916 ("mm/memory_hotplug: shrink zones when offlining memory")
-- Was marked as stable 5.0+ due to the backport complexity,, but it's also
relevant for 4.19/4.14. As I have to backport quite some cleanups
already ...
To minimize manual code changes, I decided to pull in quite some cleanups.
Still some manual code changes are necessary (indicated in the individual
patches). Especially missing arm64 hot(un)plug, missing sub-section hotadd
support, and missing unification of mm/hmm.c and kernel/memremap.c requires
care.
Due to:
- 4e0d2e7ef14d ("mm, sparse: pass nid instead of pgdat to
sparse_add_one_section()")
I need:
- afe9b36ca890 ("mm/memunmap: don't access uninitialized memmap in
memunmap_pages()")
Please note that:
- 4c4b7f9ba948 ("mm/memory_hotplug: remove memory block devices
before arch_remove_memory()")
Makes big (e.g., 32TB) machines boot up slower (e.g., 2h vs 10m). There is
a performance fix in linux-next, but it does not seem to classify as a
fix for current RC / stable.
I did quite some testing with hot(un)plug, onlining/offlining of memory
blocks and memory-less/CPU-less NUMA nodes under x86_64 - the same set of
tests I run against upstream on a fairly regular basis. I compile-tested
on PowerPC. I did not test any ZONE_DEVICE/HMM thingies.
Let's see what people think - it's a lot of patches. If we want this,
then I can try to prepare a similar set for 4.4-stable.
CCing only some people to minimize noise.
Cc: Oscar Salvador <osalvador@xxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Laurent Vivier <lvivier@xxxxxxxxxx>
Cc: Baoquan He <bhe@xxxxxxxxxx>
David Hildenbrand (25):
mm/memory_hotplug: make remove_memory() take the device_hotplug_lock
mm, sparse: drop pgdat_resize_lock in sparse_add/remove_one_section()
mm, sparse: pass nid instead of pgdat to sparse_add_one_section()
drivers/base/memory.c: remove an unnecessary check on NR_MEM_SECTIONS
mm, memory_hotplug: add nid parameter to arch_remove_memory
mm/memory_hotplug: release memory resource after arch_remove_memory()
drivers/base/memory.c: clean up relics in function parameters
mm, memory_hotplug: update a comment in unregister_memory()
mm/memory_hotplug: make unregister_memory_section() never fail
mm/memory_hotplug: make __remove_section() never fail
powerpc/mm: Fix section mismatch warning
powerpc/mm: move warning from resize_hpt_for_hotplug()
mm/memory_hotplug: make __remove_pages() and arch_remove_memory()
never fail
s390x/mm: implement arch_remove_memory()
mm/memory_hotplug: allow arch_remove_memory() without
CONFIG_MEMORY_HOTREMOVE
drivers/base/memory: pass a block_id to init_memory_block()
mm/memory_hotplug: create memory block devices after arch_add_memory()
mm/memory_hotplug: remove memory block devices before
arch_remove_memory()
mm/memory_hotplug: make unregister_memory_block_under_nodes() never
fail
mm/memory_hotplug: remove "zone" parameter from
sparse_remove_one_section
mm/hotplug: kill is_dev_zone() usage in __remove_pages()
drivers/base/node.c: simplify unregister_memory_block_under_nodes()
mm/memunmap: don't access uninitialized memmap in memunmap_pages()
mm/memory_hotplug: fix try_offline_node()
mm/memory_hotplug: shrink zones when offlining memory
arch/ia64/mm/init.c | 15 +-
arch/powerpc/include/asm/sparsemem.h | 4 +-
arch/powerpc/mm/hash_utils_64.c | 19 +-
arch/powerpc/mm/mem.c | 28 +--
arch/powerpc/platforms/powernv/memtrace.c | 2 +-
.../platforms/pseries/hotplug-memory.c | 6 +-
arch/powerpc/platforms/pseries/lpar.c | 3 +-
arch/s390/mm/init.c | 18 +-
arch/sh/mm/init.c | 15 +-
arch/x86/mm/init_32.c | 9 +-
arch/x86/mm/init_64.c | 17 +-
drivers/acpi/acpi_memhotplug.c | 2 +-
drivers/base/memory.c | 203 +++++++++++-------
drivers/base/node.c | 52 ++---
include/linux/memory.h | 8 +-
include/linux/memory_hotplug.h | 22 +-
include/linux/mmzone.h | 3 +-
include/linux/node.h | 7 +-
kernel/memremap.c | 13 +-
mm/hmm.c | 8 +-
mm/memory_hotplug.c | 166 +++++++-------
mm/sparse.c | 27 +--
22 files changed, 318 insertions(+), 329 deletions(-)
--
2.24.1
