[PATCH v3 0/7] drm: fdinfo memory stats
Tvrtko Ursulin
tvrtko.ursulin at linux.intel.com
Wed Apr 12 12:10:22 UTC 2023
On 12/04/2023 10:34, Christian König wrote:
> Am 12.04.23 um 00:56 schrieb Rob Clark:
>> From: Rob Clark <robdclark at chromium.org>
>>
>> Similar motivation to other similar recent attempt[1]. But with an
>> attempt to have some shared code for this. As well as documentation.
>>
>> It is probably a bit UMA-centric, I guess devices with VRAM might want
>> some placement stats as well. But this seems like a reasonable start.
>>
>> Basic gputop support: https://patchwork.freedesktop.org/series/116236/
>> And already nvtop support: https://github.com/Syllo/nvtop/pull/204
>>
>> [1] https://patchwork.freedesktop.org/series/112397/
>
> I think the extra client id looks a bit superfluous since the ino of the
> file should already be unique and IIRC we have been already using that one.
Do you mean file_inode(struct drm_file->filp)->i_ino ? That one would be
the same number for all clients which open the same device node so
wouldn't work.
I also don't think the atomic_add_return for client id works either,
since it can alias on overflow.
In i915 I use an xarray and __xa_alloc_cyclic.
Regards,
Tvrtko
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