Re: [PATCH v4 0/5] Support virtio-gpu DRM native context

[Alex Bennée]

Dmitry Osipenko <dmitry.osipenko@collabora.com> writes:

> On 1/12/25 19:14, Alex Bennée wrote:
>> So this goes away with:
>> 
>>   Linux draig 6.13.0-rc6-ajb-00144-g8c8d54116fa2-dirty #27 SMP 
>> PREEMPT_DYNAMIC Fri Jan 10 16:57:29 GMT 2025 x86_64 GNU/Linux
>> 
>> So I think is an artefact of the PFN page locking failing. I guess
>> native context is more prone to issues? It is a bit odd as I have loads
>> of memory and I think the intel graphics are unified memory but I don't
>> know how you would check.
>
> Native context is about same prone as Venus. For Intel GFX it doesn't
> matter much whether it's dGPU or iGPU. i915 driver would use huge pages
> for UMA which is affected by the same KVM/PFN issue. In a case of UMA,
> you may explicitly disable transparent huge pages to work around the
> problem, but this is no necessary anymore using 6.13+ kernel. Glad it
> was an easy fix!

I still can't get vulkaninfo to see anything (Error
vk::Instance:enumeratePhysicalDevices: ErrorInitializationFailed).

I've got your mesa native-context-iris set up with VK_ICD_FILENAMES
pointing at the virtio_icd.x86_64.json

VK_LOADER_DEBUG=1 doesn't show anything


-- 
Alex Bennée
Virtualisation Tech Lead @ Linaro