Hi, Here is the 2nd version of the patch and additional improvement for ring buffer on reseved memory. This depends on the series of "ring-buffer/tracing: Save module information in persistent memory" here;
https://lore.kernel.org/all/20250205225031.799739...@goodmis.org/ In v2, I removed my first 2 patches, and fixes the 3rd patch. It also add module LRU override feature which replaces the oldest removed module if the module table is full. I also added 2 patches to release the memory of persistent ring buffer if user does not need it anymore. Currently persistent ring buffer has to be enabled by kernel cmdline, user can not remove it without changing the cmdline and rebooting. This feature allows user to remove persistent ring buffer and release the memory without rebooting. Thus user can set it up by default and remove it if it is not used anymore. Thank you, --- Masami Hiramatsu (Google) (3): tracing: Show last module text symbols in the stacktrace mm/memblock: Add reserved memory release function tracing: Freeable reserved ring buffer include/linux/mm.h | 1 kernel/trace/trace.c | 190 ++++++++++++++++++++++++++++++++++++++++--- kernel/trace/trace.h | 5 + kernel/trace/trace_output.c | 3 - mm/memblock.c | 72 ++++++++++++++-- 5 files changed, 244 insertions(+), 27 deletions(-) -- Masami Hiramatsu (Google) <mhira...@kernel.org>
