Re: Re: Re: Re: [PATCH] media:v4l2-async:debugfs for registered subdevices

[Sakari Ailus]

Hi Luo,

On Tue, Mar 17, 2026 at 11:37:52AM +0800, luo.liu.linux wrote:
> 
> 
> Hi Sakari,
> 
> 	You are absolutely right. For an experienced kernel developer like
>  yourself, tools like KASAN and CONFIG_DEBUG_LIST are second nature and
>  incredibly effective for pinpointing such issues. I truly admire your
>  expertise in leveraging these advanced debugging mechanisms.
> 
> 	However, I think it is important to consider the reality for many
> junior driver developers (myself included). We often lack the deep
> intuition and extensive experience required to wield these powerful tools
> effectively in every scenario. More often than not, we still rely on
> primitive methods: struggling to reproduce intermittent crashes,
> scattering printk logs everywhere, and manually tracing execution paths.
> This process is extremely time-consuming and often yields no clear
> conclusions for "silent" resource leaks.
> 
> 	While I am actively working to improve my skills and learn to use
> these advanced tools more proficiently. I remain convinced that providing
> such a simple, intuitive interface offers a necessary supplement by
> serving as a low-barrier entry point for developers.
> 
> 	I hope this perspective clarifies why I believe this small change
> can bring a bit of convenience to a broader range of driver developers.

Just enable KASAN and list debugging in the future. New interfaces like
this won't improve things at large.

-- 
Kind regards,

Sakari Ailus