[PATCH v2 0/3] followups to debug_pagealloc improvements through page_owner

[Vlastimil Babka]

Changes since v1 [3]:

- Kirill suggested further decoupling of freeing stack capture from KASAN and
  debug_pagealloc. Also the stackdepot handle is now only allocated in page_ext
  when actually used (it was simpler than I initially thought). As that was a
  large change, I've dropped Reviewed-by from Andrey Ryabinin.
- More minor changes suggested by Kirill.

These are followups to [1] which made it to Linus meanwhile. Patches 1 and 3
are based on Kirill's review, patch 2 on KASAN request [2]. It would be nice
if all of this made it to 5.4 with [1] already there (or at least Patch 1).

[1] https://lore.kernel.org/linux-mm/20190820131828.22684-1-vbabka@xxxxxxx/
[2] https://lore.kernel.org/linux-arm-kernel/20190911083921.4158-1-walter-zh.wu@xxxxxxxxxxxx/
[3] https://lore.kernel.org/r/20190925143056.25853-1-vbabka%40suse.cz

Vlastimil Babka (3):
  mm, page_owner: fix off-by-one error in __set_page_owner_handle()
  mm, page_owner: decouple freeing stack trace from debug_pagealloc
  mm, page_owner: rename flag indicating that page is allocated

 .../admin-guide/kernel-parameters.txt         |   8 ++
 Documentation/dev-tools/kasan.rst             |   3 +
 include/linux/page_ext.h                      |  10 +-
 include/linux/page_owner.h                    |   1 +
 mm/page_ext.c                                 |  24 ++--
 mm/page_owner.c                               | 117 ++++++++++++------
 6 files changed, 109 insertions(+), 54 deletions(-)

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2.23.0