mirror of
https://github.com/torvalds/linux.git
synced 2025-12-07 20:06:24 +00:00
61d445af0a
The event trigger data requires a full tracepoint_synchronize_unregister() call before freeing. That call can take 100s of milliseconds to complete. In order to allow for bulk freeing of the trigger data, it can not call the tracepoint_synchronize_unregister() for every individual trigger data being free. Create a kthread that gets created the first time a trigger data is freed, and have it use the lockless llist to get the list of data to free, run the tracepoint_synchronize_unregister() then free everything in the list. By freeing hundreds of event_trigger_data elements together, it only requires two runs of the synchronization function, and not hundreds of runs. This speeds up the operation by orders of magnitude (milliseconds instead of several seconds). Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Tom Zanussi <zanussi@kernel.org> Link: https://patch.msgid.link/20251125214032.151674992@kernel.org Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
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.