[Intel-gfx] [PATCH 00/23] huge gtt pages

[Matthew Auld]

On 22 August 2017 at 15:23, Chris Wilson <chris at chris-wilson.co.uk> wrote:
> Quoting Chris Wilson (2017-08-22 15:21:10)
>> Quoting Matthew Auld (2017-08-21 19:34:40)
>> > Some more improvements as per Chris' comments.
>> >
>> > Matthew Auld (23):
>> >   mm/shmem: introduce shmem_file_setup_with_mnt
>> >   drm/i915: introduce simple gemfs
>> >   drm/i915/gemfs: enable THP
>> >   drm/i915: introduce page_size_mask to dev_info
>> >   drm/i915: push set_pages down to the callers
>> >   drm/i915: introduce page_size members
>> >   drm/i915: introduce vm set_pages/clear_pages
>> >   drm/i915: align the vma start to the largest gtt page size
>> >   drm/i915: align 64K objects to 2M
>> >   drm/i915: enable IPS bit for 64K pages
>> >   drm/i915: disable GTT cache for 2M/1G pages
>> >   drm/i915: support 1G pages for the 48b PPGTT
>> >   drm/i915: support 2M pages for the 48b PPGTT
>> >   drm/i915: add support for 64K scratch page
>> >   drm/i915: support 64K pages for the 48b PPGTT
>> >   drm/i915: accurate page size tracking for the ppgtt
>> >   drm/i915/debugfs: include some gtt page size metrics
>> >   drm/i915/selftests: huge page tests
>> >   drm/i915/selftests: mix huge pages
>> >   drm/i915: disable platform support for vGPU huge gtt pages
>> >   drm/i915: enable platform support for 64K pages
>> >   drm/i915: enable platform support for 2M pages
>> >   drm/i915: enable platform support for 1G pages
>>
>> Ok, looking good. I keep pushing off the selftest review, sorry. I did
>> start going through it and felt that it could do with a lot more
>> permutations of pages sizes within an object to try and exercise the
>> different boundaries and levels.

Fair enough, I'll try to come up with something better.

> And the other pencilled in suggestion I have is that you grab the
> THP/memfd work and put together a userptr igt that can allocate and
> utilize huge pages. For that we will need a I915_PARAM to report the
> supported pages sizes (and then have to mask that against the THP
> supported pages sizes).

Yup, on my TODO.

> -Chris
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