From: Paolo Abeni <pabeni@redhat.com>
Date: Wed, 18 Apr 2018 13:17:54 +0200

When testing with Spectre/Meltdown mitigation in places, I expect
that the most relevant part of the gain is due to the single syscall
per burst.

I was going to say exactly this.

Batching schemes that were borderline beneficial before spectre/meltdown
are more worthwhile now.