[Bug 196409] kvm_amd nested pagetable gpu passthrough performance oddities

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https://bugzilla.kernel.org/show_bug.cgi?id=196409

John Kelley (john@xxxxxxxxx) changed:

           What    |Removed                     |Added
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                 CC|                            |john@xxxxxxxxx

--- Comment #14 from John Kelley (john@xxxxxxxxx) ---
I am also experiencing the above mentioned issue with very similar performance
impact. I am currently not using the virtualization features due to this
performance bug with AMD Nested Page Tables.

CPU - AMD Ryzen 7 1800x
MB - Asus PRIME X370-PRO
Host GPU - AMD Radeon 480
Guest GPU - AMD Radeon r290
Host OS - Arch Linux, 4.11.9 kernel (Previously 4.9, 4.10)
Guest OS - Windows 10 Pro Anniversary Edition

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