TWx Linux Repository
6d02eefecc
The mapping of the ring buffer to memory allocated at boot up will also expose a "last_boot_info" to help tooling to read the raw data from the last boot. As instances that have their ring buffer mapped to fixed memory cannot perform snapshots, they can either have the "snapshot" file or the "last_boot_info" file, but not both. The code that added the "last_boot_info" file failed to notice that the "snapshot" creation was inside a "#ifdef CONFIG_TRACER_SNAPSHOT" and incorrectly placed the creation of the "last_boot_info" file within the ifdef block. Not only does it cause a warning when CONFIG_TRACER_SNAPSHOT is not enabled, it also incorrectly prevents the file from appearing. Link: https://lore.kernel.org/all/20240719102640.718554-1-arnd@kernel.org/ Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Reported-by: Arnd Bergmann <arnd@kernel.org> Link: https://lore.kernel.org/20240719101312.3d4ac707@rorschach.local.home Fixes: 7a1d1e4b9639 ("tracing/ring-buffer: Add last_boot_info file to boot instance") Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.