[Bug 196409] kvm_amd nested pagetable gpu passthrough performance oddities

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

Fruhwirth Clemens (clemens@xxxxxxxxxxxxx) changed:

           What    |Removed                     |Added
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                 CC|                            |clemens@xxxxxxxxxxxxx

--- Comment #20 from Fruhwirth Clemens (clemens@xxxxxxxxxxxxx) ---
For a fix, I am publicly offering a bounty expiring 2017/11/01 of 0.02 Bitcoin
(~100$ at the current price) redeemable by the person on the respective git
commit.

Maybe a good starting point is grepping through the code for "npt_enabled" and
doing some random guesswork, and/or introducing more performance counter at
host or guest to increase visibility. Maybe we can take apart a benchmark and
identity the operation that is slow.

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