From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 196409] kvm_amd nested pagetable gpu passthrough performance
 oddities
Date: Wed, 30 Aug 2017 08:36:02 +0000
Message-ID: <bug-196409-28872-g4CM3RYVDA@https.bugzilla.kernel.org/>
References: <bug-196409-28872@https.bugzilla.kernel.org/>
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https://bugzilla.kernel.org/show_bug.cgi?id=196409

John Kelley (john@kelley.ca) changed:

           What    |Removed                     |Added
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                 CC|                            |john@kelley.ca

--- Comment #14 from John Kelley (john@kelley.ca) ---
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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