linux-kernel - Re: [PATCH 1/3] tracing: Export eval_map_wq for asynchronous use by other modules

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Message-ID: <d9e906f5-adfe-45da-84fe-d47ef9a159ba@kylinos.cn>
Date: Mon, 26 Jan 2026 10:45:32 +0800
From: Yaxiong Tian <tianyaxiong@...inos.cn>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: axboe@...nel.dk, mhiramat@...nel.org, mathieu.desnoyers@...icios.com,
 linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-trace-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] tracing: Export eval_map_wq for asynchronous use by
 other modules


在 2026/1/24 04:32, Steven Rostedt 写道:
> On Thu, 22 Jan 2026 11:24:15 +0800
> Yaxiong Tian <tianyaxiong@...inos.cn> wrote:
>
>> The eval_map_work_func() function, though queued in eval_map_wq,
>> holds the trace_event_sem read-write lock for a long time during
>> kernel boot. This causes blocking issues for other functions.
>>
>> Making eval_map_wq extern allows other modules to schedule their
>> work asynchronously on this queue,  preventing it from blocking
>> the main boot thread.
> If you are going to make this wq generic for other parts of the tracing
> code, then let's rename it. As "eval_map" is specific to the enum mappings
> being updated (which I hope someday I can get that update working at build
> time. And when I do, the name will be totally meaningless).
>
> Let's rename it to "trace_init_wq" instead.
>
> -- Steve

Thank you for your suggestion. I have renamed it to trace_init_wq and 
released the V2 version.