| From: |
| "Masami Hiramatsu (Google)" <mhiramat-AT-kernel.org> |
| To: |
| Steven Rostedt <rostedt-AT-goodmis.org>, Catalin Marinas <catalin.marinas-AT-arm.com>, Will Deacon <will-AT-kernel.org> |
| Subject: |
| [PATCH v17 0/5] ring-buffer: Making persistent ring buffers robust |
| Date: |
| Thu, 23 Apr 2026 01:16:26 +0900 |
| Message-ID: |
| <177687458572.932171.10907864814735342737.stgit@mhiramat.tok.corp.google.com> |
| Cc: |
| Masami Hiramatsu <mhiramat-AT-kernel.org>, Mathieu Desnoyers <mathieu.desnoyers-AT-efficios.com>, linux-kernel-AT-vger.kernel.org, linux-trace-kernel-AT-vger.kernel.org, Ian Rogers <irogers-AT-google.com>, linux-arm-kernel-AT-lists.infradead.org |
| Archive-link: |
| Article |
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/177547105523.259641.143858915...
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/177552432201.853249.512504...
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@kernel.org>
