[Bug 109649] [bisected][raven] gfx ring timeout when running clover apps

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109649

--- Comment #6 from Jan Vesely <jv356 at scarletmail.rutgers.edu> ---
I managed to get IOMMU working by passing "amd_iommu=pt
ivrs_ioapic[32]=00:14.0" on the kernel commandline.
Now it's back to square one.
all clover kernels hang the GPU unless I limit VM size to 'vm_size =
min(vm_size, 1ULL << 40);'
otherwise the machine works (including 3d graphics and suspend/resume).

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