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Author SHA1 Message Date
Praveen Kumar Singh d0eab64faf docs: memory-hotplug: fix typo 'fo' -> 'for' in NODE_ADDED_FIRST_MEMORY description 
The description of NODE_ADDED_FIRST_MEMORY notification contains
a missing 'r' in the word 'for'. Fix the typo.

Signed-off-by: Praveen Kumar Singh <[email protected]>
Signed-off-by: Jonathan Corbet <[email protected]>
Message-ID: <by7jSPCep0WcWKD6nntH0wGbcN59hRhsEOc2lHBps2QizxRtedH25CdW8DO33YiqJU3Y7kGWesJnBts-jvgMzNqDvLWH3cTDYpJPuNed9hU=@proton.me>
 2026-03-17 08:42:05 -06:00
Oscar Salvador d2a9721d80 mm,memory_hotplug: drop status_change_nid parameter from memory_notify 
There no users left of status_change_nid, so drop it from memory_notify
struct.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Oscar Salvador <[email protected]>
Suggested-by: David Hildenbrand <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Reviewed-by: Vlastimil Babka <[email protected]>
Cc: Harry Yoo <[email protected]>
Cc: Hyeonggon Yoo <[email protected]>
Cc: Joanthan Cameron <[email protected]>
Cc: Rakie Kim <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
 2025-07-13 16:38:17 -07:00
Oscar Salvador 67929de108 mm,memory_hotplug: implement numa node notifier 
There are at least six consumers of hotplug_memory_notifier that what they
really are interested in is whether any numa node changed its state, e.g:
going from having memory to not having memory and vice versa.

Implement a specific notifier for numa nodes when their state gets
changed, which will later be used by those consumers that are only
interested in numa node state changes.

Add documentation as well.

[[email protected]: set failure reason in offline_pages()]
  Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Oscar Salvador <[email protected]>
Signed-off-by: Dan Carpenter <[email protected]>
Reviewed-by: Jonathan Cameron <[email protected]>
Reviewed-by: Harry Yoo <[email protected]>
Reviewed-by: Vlastimil Babka <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Cc: Hyeonggon Yoo <[email protected]>
Cc: Rakie Kim <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
 2025-07-13 16:38:15 -07:00
Oscar Salvador 8d2882a8ed mm,memory_hotplug: remove status_change_nid_normal and update documentation 
Now that the last user of status_change_nid_normal is gone, we can remove
it.  Update documentation accordingly.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Oscar Salvador <[email protected]>
Reviewed-by: Vlastimil Babka <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Cc: Harry Yoo <[email protected]>
Cc: Hyeonggon Yoo <[email protected]>
Cc: Joanthan Cameron <[email protected]>
Cc: Rakie Kim <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
 2025-07-13 16:38:14 -07:00
David Hildenbrand 6b740c6c3a mm/memory_hotplug: remove HIGHMEM leftovers 
We don't support CONFIG_MEMORY_HOTPLUG on 32 bit and consequently not
HIGHMEM.  Let's remove any leftover code -- including the unused
"status_change_nid_high" field part of the memory notifier.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: David Hildenbrand <[email protected]>
Reviewed-by: Oscar Salvador <[email protected]>
Cc: Alex Shi <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jason Wang <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: "Michael S. Tsirkin" <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
 2021-11-06 13:30:42 -07:00
David Hildenbrand 3a7452c5a7 docs/core-api: memory-hotplug: add some details about locking internals 
Let's document the magic a bit, especially why device_hotplug_lock is
required when adding/removing memory and how it all play together with
requests to online/offline memory from user space.

[ rppt: moved the text to Documentation/core-api/memory-hotplug.rst ]

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: David Hildenbrand <[email protected]>
Reviewed-by: Pavel Tatashin <[email protected]>
Reviewed-by: Rashmica Gupta <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Balbir Singh <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Boris Ostrovsky <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Haiyang Zhang <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: John Allen <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: Juergen Gross <[email protected]>
Cc: Kate Stewart <[email protected]>
Cc: "K. Y. Srinivasan" <[email protected]>
Cc: Len Brown <[email protected]>
Cc: Martin Schwidefsky <[email protected]>
Cc: Mathieu Malaterre <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Michael Neuling <[email protected]>
Cc: Nathan Fontenot <[email protected]>
Cc: Oscar Salvador <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Philippe Ombredanne <[email protected]>
Cc: Rafael J. Wysocki <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Stephen Hemminger <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: YASUAKI ISHIMATSU <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Mike Rapoport <[email protected]>
Signed-off-by: Jonathan Corbet <[email protected]>
 2018-10-12 11:14:19 -06:00
Mike Rapoport 52d7e21fd5 docs/core-api: rename memory-hotplug-notifier to memory-hotplug 
to allow additions of new documentation about memory hotplug under the same
roof.

Signed-off-by: Mike Rapoport <[email protected]>
Reviewed-by: David Hildenbrand <[email protected]>
Signed-off-by: Jonathan Corbet <[email protected]>
 2018-10-12 11:13:57 -06:00