Zbigniew Jędrzejewski-Szmek
217b7b33cc
We can meaningfully compare jobs for units which have cpu weight or nice set.
But non-exec units those have those set.
Starting non-exec jobs first allows us to get them out of the queue quickly,
and consider more jobs for starting.
If we have service A, and socket B, and service C which is after socket B,
and we want to start both A and C, and C has higher cpu weight, if we get
B out of the way first, we'll know that we can start both A and C, and we'll
start C first.
Also invert the comparisons using CMP() so they are always done left vs. right,
and negate when returning instead.
Follow-up for da8e178296.
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