Re: [RFC PATCH 1/2] locking: add mutex_lock_nospin()

[Steven Rostedt]

On Thu, 5 Mar 2026 10:17:09 +0800
Yafang Shao <laoar.shao@xxxxxxxxx> wrote:

> bpftrace is a widely used tool for online debugging and dynamic
> tracing. However, sysadmins may unknowingly run multiple bpftrace
> instances concurrently without realizing the potential impact on
> system performance.
> 
> If this is your answer, I believe we should clearly document the
> following warning:
> 
>   Warning: Do not read available_filter_functions concurrently, as
> doing so can significantly degrade system performance and potentially
> impact production workloads.

Or update bpftrace to cache that file. It's only updated on module load
and unload, which isn't done much. There's no reason it needs to
constantly read that file if bpftrace is being used constantly.


-- Steve