On 2021-03-30 21:02 +0800, Xi Ruoyao wrote: > On 2021-03-30 14:55 +0200, Christian König wrote: > > > > I rather see this as a kernel bug. Can you test if this code fragment > > fixes your issue: > > > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c > > b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c > > index 64beb3399604..e1260b517e1b 100644 > > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c > > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c > > @@ -780,7 +780,7 @@ int amdgpu_info_ioctl(struct drm_device *dev, void > > *data, struct drm_file *filp) > > } > > dev_info->virtual_address_alignment = > > max((int)PAGE_SIZE, AMDGPU_GPU_PAGE_SIZE); > > dev_info->pte_fragment_size = (1 << > > adev->vm_manager.fragment_size) * AMDGPU_GPU_PAGE_SIZE; > > - dev_info->gart_page_size = AMDGPU_GPU_PAGE_SIZE; > > + dev_info->gart_page_size = > > dev_info->virtual_address_alignment; > > dev_info->cu_active_number = adev->gfx.cu_info.number; > > dev_info->cu_ao_mask = adev->gfx.cu_info.ao_cu_mask; > > dev_info->ce_ram_size = adev->gfx.ce_ram_size; > > It works. I've seen it at > https://github.com/xen0n/linux/commit/84ada72983838bd7ce54bc32f5d34ac5b5aae191 > before (with a common sub-expression, though :). Some comment: on an old version of Fedora ported by Loongson, Xorg just hangs without this commit. But on the system I built from source, I didn't see any issue before Linux 5.11. So I misbelieved that it was something already fixed. Dan: you can try it on your PPC 64 with non-4K page as well. -- Xi Ruoyao <xry111@xxxxxxxxxxxxxxxx> School of Aerospace Science and Technology, Xidian University
