tracing: Add creation of instances at boot command line

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Add kernel command line to add tracing instances. This only creates
instances at boot but still does not enable any events to them. Later
changes will extend this command line to add enabling of events, filters,
and triggers. As well as possibly redirecting trace_printk()!

Link: https://lkml.kernel.org/r/20230207173026.186210158@goodmis.org

Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Ross Zwisler <zwisler@google.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

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Steven Rostedt (Google) 2023-02-07 12:28:50 -05:00

parent 9971c3f944

commit cb1f98c5e5

2 changed files with 56 additions and 0 deletions

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6

Documentation/admin-guide/kernel-parameters.txt

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50

kernel/trace/trace.c

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