blktrace: Make init_blk_tracer() asynchronous

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The init_blk_tracer() function causes significant boot delay as it
waits for the trace_event_sem lock held by trace_event_update_all().
Specifically, its child function register_trace_event() requires
this lock, which is occupied for an extended period during boot.

To resolve this, the execution of primary init_blk_tracer() is moved
to the trace_init_wq workqueue, allowing it to run asynchronously,
and prevent blocking the main boot thread.

Link: https://patch.msgid.link/20260204015353.163331-1-tianyaxiong@kylinos.cn
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Yaxiong Tian <tianyaxiong@kylinos.cn>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

...

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Yaxiong Tian 2026-02-04 09:53:53 +08:00 • committed by Steven Rostedt (Google)

parent 1c48f7ab72

commit 0c2580a809

1 changed files with 22 additions and 1 deletions

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kernel/trace/blktrace.c

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