[PATCH 2/2] drm/amdgpu: add AMDGPURESET uevent on AMD GPU reset

Sharma, Shashank shashank.sharma at amd.com
Mon Jan 17 11:43:59 UTC 2022

Hello Christian,

On 1/17/2022 11:37 AM, Christian König wrote:
> Am 17.01.22 um 11:34 schrieb Somalapuram, Amaranath:
>> [SNIP]
>> Any suggestion how we can notify user space during this situation. 
> Well trace points should work. They use a ring buffer and are specially 
> made to work in such situations.

We are anyways sending a trace event with data, but can trace event be a 
wake up source for an application (like a tracer) ? This DRM event is 
just to indicate that reset happened, so app has to read from trace file.

> Alternative would be to audit the udev code and allow giving a GFP mask 
> to the function to make sure that we don't run into the deadlock.
> Another alternative is a debugfs file which just blocks for the next 
> reset to happen.

- Shashank

> Regards,
> Christian.
>> Regards,
>> S.Amarnath

More information about the amd-gfx mailing list