tracing: Allow boot instances to have snapshot buffers

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Add to ftrace_boot_snapshot, "=<instance>" name, where the instance will
get a snapshot buffer, and will take a snapshot at the end of boot (which
will save the boot traces).

Link: https://lkml.kernel.org/r/20230207173026.792774721@goodmis.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 12:28:53 -05:00

parent d503b8f747

commit 9c1c251d67

2 changed files with 81 additions and 7 deletions

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9

Documentation/admin-guide/kernel-parameters.txt

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79

kernel/trace/trace.c

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