Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

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Hi,

On 2/13/21 10:41 PM, Tom Seewald wrote:
  > The GPUs also have firmware blobs
Could you provide some links to mailing list posts or bug reports where AMD developers confirm that their GPU firmware requires 4k pages? I think having some definitive sources will make this situation more clear.

So far the only amdgpu bug report I could find that relates to 64k pages[1] is a regression, as the reporter states the driver works with the 5.4 kernel. If someone with a power9 machine is willing to bisect the issue I think that would greatly increase the odds of this bug being resolved.

I can confirm that amdgpu worked with 64k pages on arm in the past with various GPUs. I haven't been testing it regularly though, but we will want it for rhel/centos which use 64k pages on aarch64 too.



[1] https://gitlab.freedesktop.org/drm/amd/-/issues/1446
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