a512d0ab00
In FreeBSD, the current time is computed from uptime + boottime. Uptime is a continuous, smooth function that's monotonically increasing. To effect changes to the current time, boottime is adjusted. boottime is mutable and shouldn't be cached against future need. Document the current implementation, with the caveat that we may stop stepping boottime on resume in the future and will step uptime instead (noted in the commit message, but not in the code). Sponsored by: Netflix Reviewed by: phk, rpokala Differential Revision: https://reviews.freebsd.org/D30116 |
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