CVS commit: src/sys/kern

["Andrew Doran" <ad%netbsd.org@localhost>]

Module Name:    src
Committed By:   ad
Date:           Thu Nov 21 20:51:05 UTC 2019

Modified Files:
        src/sys/kern: kern_synch.c

Log Message:
- Don't give up kpriority boost in preempt().  That's unfair and bad for
  interactive response.  It should only be dropped on final return to user.
- Clear l_dopreempt with atomics and add some comments around concurrency.
- Hold proc_lock over the lightning bolt and loadavg calc, no reason not to.
- cpu_did_preempt() is useless - don't call it.  Will remove soon.


To generate a diff of this commit:
cvs rdiff -u -r1.324 -r1.325 src/sys/kern/kern_synch.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.