Thanks Joseph! I'm seeing the same effect described by Martin.
Boot+lightdm+loading Unity 7 is not as fast as it used to be in 16.04.

I need to compare timings (4.8 patched vs 4.8 vs 4.4) tomorrow to make
sure, but I also feel like it's a little faster now with the patches
applied.

The number of kworker processes after boot has reduced drastically using
the patched kernel, it's a sane number now (~30), not 1004 like when
using the unpatched 4.8 kernel.

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https://bugs.launchpad.net/bugs/1626436

Title:
  [4.8 regression] boot has become very slow

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