cvs commit: src/sys/kern sched_ule.c

[Jeff Roberson]

jeff        2004-12-14 10:34:27 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             sched_ule.c 
  Log:
   - In kseq_choose(), don't recalculate slice values for processes with a
     nice of 0.  Doing so can cause an infinite loop because they should be
     running, but a nice -20 process could prevent them from doing so.
   - Add a new flag KEF_PRIOELEV to flag a thread that has had its priority
     elevated due to priority propagation.  If a thread has had its priority
     elevated, we assume that it must go on the current queue and it must
     get a slice.
   - In sched_userret() if our priority was elevated and we shouldn't have
     a timeslice, yield here until we should.
  
  Found/Tested by:        glebius
  
  Revision  Changes    Path
  1.139     +25 -11    src/sys/kern/sched_ule.c