[Intel-gfx] [PATCH 2/5] drm/i915: Expose list of clients in sysfs

[Tvrtko Ursulin]

On 16/12/2019 13:17, Chris Wilson wrote:
> Quoting Tvrtko Ursulin (2019-12-16 12:07:01)
>> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
>>
>> Expose a list of clients with open file handles in sysfs.
>>
>> This will be a basis for a top-like utility showing per-client and per-
>> engine GPU load.
>>
>> Currently we only expose each client's pid and name under opaque numbered
>> directories in /sys/class/drm/card0/clients/.
>>
>> For instance:
>>
>> /sys/class/drm/card0/clients/3/name: Xorg
>> /sys/class/drm/card0/clients/3/pid: 5664
> 
> Should we even bother having the name here? And just have a link to pid
> instead? Contemplating even pidfd for ultramodern.

I haven't looked at what symlink creation facilities sysfs would allow. 
But even then, I don't see how we could link to proc from sysfs.

I had a quick read on pidfd and don't see how it fits. What did you have 
in mind?

Regards,

Tvrtko