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b8fe144301
tuned 2.11.0-9 and later writes to kerned.sched_wakeup_granularity_ns
and other sysctl tunables that we so laboriously tuned, dropping
performance by a factor of 5 (due to increased latency). Fix by
obsoleting tuned during install (in effect, we are a better tuned,
at least for us).
Not needed for .deb, since debian/ubunto do not install tuned by
default.
Fixes #7696
Closes #7776
(cherry picked from commit 615b8e8184)