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Fix the long term ULE load balancer so that it actually works. The

Description

Fix the long term ULE load balancer so that it actually works. The
initial call to sched_balance() during startup is meant to initialize
balance_ticks, but does not actually do that since smp_started is
still zero at that time. Since balance_ticks does not get set,
there are no further calls to sched_balance(). Fix this by setting
balance_ticks in sched_initticks() since we know the value of
balance_interval at that time, and eliminate the useless startup
call to sched_balance(). We don't need to randomize the intial
value of balance_ticks.

Since there is now only one call to sched_balance(), we can hoist
the tests at the top of this function out to the caller and avoid
the overhead of the function call when running a SMP kernel on UP
hardware.

PR: 223914
Reviewed by: kib
MFC after: 2 weeks

Details

Committed
truckmanJul 29 2018, 12:30 AM
Reviewer
kib
Parents
rS336854: MFV r336851:
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