[PATCH v17 0/5] ring-buffer: Making persistent ring buffers robust

[Masami Hiramatsu (Google)]

Hi,

Here is the 17th version of improvement patches for making persistent
ring buffers robust to failures.
The previous version is here:

https://lore.kernel.org/all/177547105523.259641.14385891517704197263.stgit@mhiramat.tok.corp.google.com/

This version fixes some review comments from Sashiko[1], which
includes:
[2/5] Fix to use rb_page_size() of rewound pages for entry_bytes.
[3/5] - Fix to verify head_page at first before using its timestamp.
      - Reset timestamp if the page is invalid.
[4/5] - In rb_test_inject_invalid_pages(), changed entry_bytes and
       idx to unsigned long
      - Added NULL checks for cpu_buffer and meta.
      - In allocate_trace_buffer(), added a NULL check for tr->name
       before comparing it with strcmp.
[5/5] Added NULL check for dpage in rbm_show in ring_buffer.c.

[1] https://sashiko.dev/#/patchset/177552432201.853249.5125045538812833325.stgit%40mhiramat.tok.corp.google.com

Thank you,

Masami Hiramatsu (Google) (5):
      ring-buffer: Flush and stop persistent ring buffer on panic
      ring-buffer: Skip invalid sub-buffers when validating persistent ring buffer
      ring-buffer: Skip invalid sub-buffers when rewinding persistent ring buffer
      ring-buffer: Add persistent ring buffer invalid-page inject test
      ring-buffer: Show commit numbers in buffer_meta file


 arch/alpha/include/asm/Kbuild        |    1 
 arch/arc/include/asm/Kbuild          |    1 
 arch/arm/include/asm/Kbuild          |    1 
 arch/arm64/include/asm/ring_buffer.h |   10 +
 arch/csky/include/asm/Kbuild         |    1 
 arch/hexagon/include/asm/Kbuild      |    1 
 arch/loongarch/include/asm/Kbuild    |    1 
 arch/m68k/include/asm/Kbuild         |    1 
 arch/microblaze/include/asm/Kbuild   |    1 
 arch/mips/include/asm/Kbuild         |    1 
 arch/nios2/include/asm/Kbuild        |    1 
 arch/openrisc/include/asm/Kbuild     |    1 
 arch/parisc/include/asm/Kbuild       |    1 
 arch/powerpc/include/asm/Kbuild      |    1 
 arch/riscv/include/asm/Kbuild        |    1 
 arch/s390/include/asm/Kbuild         |    1 
 arch/sh/include/asm/Kbuild           |    1 
 arch/sparc/include/asm/Kbuild        |    1 
 arch/um/include/asm/Kbuild           |    1 
 arch/x86/include/asm/Kbuild          |    1 
 arch/xtensa/include/asm/Kbuild       |    1 
 include/asm-generic/ring_buffer.h    |   13 ++
 include/linux/ring_buffer.h          |    1 
 kernel/trace/Kconfig                 |   34 ++++
 kernel/trace/ring_buffer.c           |  275 ++++++++++++++++++++++++++--------
 kernel/trace/trace.c                 |    4 
 26 files changed, 290 insertions(+), 67 deletions(-)
 create mode 100644 arch/arm64/include/asm/ring_buffer.h
 create mode 100644 include/asm-generic/ring_buffer.h


base-commit: 6170922f137231b98fc568571befef63e1edff3f
--
Masami Hiramatsu (Google) <mhiramat at kernel.org>