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priorities, etc.) in the NICE field: Use a combination of pri_native and pri_user instead of pri_level to guess the original realtime priority. Using pri_level here has been wrong since 2001/02/12. Using only pri_native here would be correct if the kernel actually initialized it reasonably. (The kernel exports its raw td_base_priority as pri_native, but userland mostly wants a refined base priority). Give up on waiting pri_native to work correctly and only use it when there is nothing better (for kthreads). This should reduce printing of bizarre pseudo-nice values. Bizarre values are still printed if we observe a transient borrowed priority for a kthread (transient borrowing is the main thing that makes the raw td_base_priority almost useless in userland), or if there is a kernel bug. One current kernel bug involves the kernel idprio thread pagezero permanently changing its priority from PRI_MAX_IDLE (255) to PUSER (160). Then the bizarre value "ki-6" is printed instead of "ki31". Here "-6" is PRI_MIN_IDLE - PUSER = -64 truncated to 2 characters. We are observing a transient borrowed priority that has become permanent due to a bug. ps/print.c:priorityr() needs similar changes (including ones in stage 2 here).
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