Re: [PATCH 1/2] drm/amdgpu: Move racy global PMU list into device

Brian Norris
2022-11-09T01:22:09Z

On Tue, Nov 08, 2022 at 11:50:04AM -0500, Felix Kuehling wrote:
> While you're making the pmu list per-device, I'd suggest removing adev from
> the pmu entry because it is now redundant. The device is implied by the list
> that the entry is on. Instead, add an adev parameter to
> init_pmu_entry_by_type_and_add. Or you could move the list_add_tail to
> amdgpu_pmu_init and remove "_and_add" from the function name.

Sorry if I'm being naive here, but does that mean trying to navigate the
list pointers to move from a 'pmu_entry' to an 'adev'
(list_first_entry(), etc.)? There are quite a few cases where we're
trying to go between 'pmu_entry' and 'adev'. I guess I could turn that
into a mini helper.

I'll also need to scrounge around a bit to see if I have an amdgpu
system around that actually supports PMU. I realized the one I tested on
doesn't actually hit this code path... and this would be getting a
little less obvious/trivial.

> Other than that, the patch looks good to me.

Thanks for looking!

Brian