[v4,0/5] ptdump: add intermediate directory support

Message

Maxwell Bland June 18, 2024, 2:37 p.m. UTC

Makes many several improvements to (arm64) ptdump debugging, including:

- support note_page on intermediate table entries
- (arm64) print intermediate entries and add an array for their specific
  attributes
- (arm64) adjust the entry ranges to remove the implicit exclusive upper
  bound
- (arm64) indent page table by level while maintaining attribute
  alignment
- (arm64) improve documentation clarity, detail, and precision

Thank you again to the maintainers for their review of this patch.

A comparison of the differences in output is provided here:
github.com/maxwell-bland/linux-patch-data/tree/main/ptdump-non-leaf

New in v4:
- Inclusive upper bounds on range specifications
- Splits commit into multiple smaller commits and separates cosmetic,
  documentation, and logic changes
- Updates documentation more sensibly
- Fixes bug in size computation and handles ULONG_MAX bound overflow

v3:
https://lore.kernel.org/all/fik5ys53dbkpkl22o4s7sw7cxi6dqjcpm2f3kno5tyms73jm5y@buo4jsktsnrt/
- Added tabulation to delineate entries
- Fixed formatting issues with mailer and rebased to mm/linus

v2:
https://lore.kernel.org/r/[e-mail]
- Rebased onto linux-next/akpm (the incorrect branch)

v1:
https://lore.kernel.org/all/[e-mail]/


Maxwell Bland (5):
  mm: add ARCH_SUPPORTS_NON_LEAF_PTDUMP
  arm64: non leaf ptdump support
  arm64: indent ptdump by level, aligning attributes
  arm64: exclusive upper bound for ptdump entries
  arm64: add attrs and format to ptdump document

 Documentation/arch/arm64/ptdump.rst | 126 ++++++++++++-----------
 arch/arm64/Kconfig                  |   1 +
 arch/arm64/mm/ptdump.c              | 149 +++++++++++++++++++++++++---
 mm/Kconfig.debug                    |   9 ++
 mm/ptdump.c                         |  21 ++--
 5 files changed, 217 insertions(+), 89 deletions(-)