forked from luck/tmp_suning_uos_patched
896fbe20b4
Replace the existing ringbuffer usage and implementation with lockless ringbuffer usage. Even though the new ringbuffer does not require locking, all existing locking is left in place. Therefore, this change is purely replacing the underlining ringbuffer. Changes that exist due to the ringbuffer replacement: - The VMCOREINFO has been updated for the new structures. - Dictionary data is now stored in a separate data buffer from the human-readable messages. The dictionary data buffer is set to the same size as the message buffer. Therefore, the total required memory for both dictionary and message data is 2 * (2 ^ CONFIG_LOG_BUF_SHIFT) for the initial static buffers and 2 * log_buf_len (the kernel parameter) for the dynamic buffers. - Record meta-data is now stored in a separate array of descriptors. This is an additional 72 * (2 ^ (CONFIG_LOG_BUF_SHIFT - 5)) bytes for the static array and 72 * (log_buf_len >> 5) bytes for the dynamic array. Signed-off-by: John Ogness <john.ogness@linutronix.de> Reviewed-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Petr Mladek <pmladek@suse.com> Link: https://lore.kernel.org/r/20200709132344.760-5-john.ogness@linutronix.de |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| 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 Restructured Text 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.