Re: [PATCH v4 5/5] blktrace: Make init_blk_tracer() asynchronous when trace_async_init set

Steven Rostedt
2026-01-30T03:45:30Z

On Thu, 29 Jan 2026 22:31:16 -0500
Steven Rostedt <rostedt@goodmis.org> wrote:

> I added the below patch and have this result:
>
> kworker/u33:1-79 [002] ..... 1.840855: trace_event_update_all: Start syncing
> swapper/0-1 [005] ..... 6.045742: trace_eval_sync: sync maps
> kworker/u33:1-79 [002] ..... 12.289296: trace_event_update_all: Finish syncing
> swapper/0-1 [005] ..... 12.289387: trace_eval_sync: sync maps complete
>
> Which shows that the final initcall waited for the work queue to complete:

Switching to printk() gives me the same results:

# dmesg |grep sync
[ 1.117856] Start syncing
[ 4.498360] sync maps
[ 11.173304] Finish syncing
[ 11.175660] sync maps complete

-- Steve