Re: [PATCH 0/7] Per client engine busyness

On 17/05/2021 20:03, Simon Ser wrote:

On Monday, May 17th, 2021 at 8:16 PM, Nieto, David M David.Nieto@amd.com wrote:

...

Btw is DRM_MAJOR 226 consider uapi? I don't see it in uapi headers.

It's not in the headers, but it's de facto uAPI, as seen in libdrm:

 > git grep 226
 xf86drm.c
 99:#define DRM_MAJOR 226 /* Linux */

I suspected it would be yes, thanks.

I was just wondering if stat(2) and a chrdev major check would be a solid criteria to more efficiently (compared to parsing the text content) detect drm files while walking procfs.

Regards,

Tvrtko