pub(crate) fn boost_thread_priority(nice: c_int)Expand description
Give the calling thread the nice level nice, below the default. setpriority takes it
only with CAP_SYS_NICE or an RLIMIT_NICE that reaches it, which a session’s process rarely
has; where it refuses, the request goes to rtkit over the system bus, which grants a
level within the daemon’s own bounds to any process of the seat. A host without rtkit,
or without a system bus at all as a container is, leaves the thread at the default, said
once in the log.