DragonFlyBSD

hogticks was a global definition used in kern_synch.c:should_yield().
A thread that had remained running for more than hogticks would
return true for should_yield(). DragonFly has not used this global
for a long time.
---
sys/kern/kern_synch.c | 4 ----
sys/sys/proc.h | 1
2 files changed, 5 deletions()

diff --git a/sys/kern/kern_synch.c b/sys/kern/kern_synch.c
index 9285e2a..6fd5434 100644
--- a/sys/kern/kern_synch.c
+++ b/sys/kern/kern_synch.c
@ -66,7 +66,6 @ TAILQ_HEAD(tslpque, thread);
static void sched_setup (void *dummy);
SYSINIT

int hogticks;
int lbolt;
void lbolt_syncer;
int sched_quantum; / Roundrobin scheduling quantum in ticks. */
@ -128,7 +127,6 @ sysctl_kern_quantum(SYSCTL_HANDLER_ARGS)
if (new_val < ustick)
return (EINVAL);
sched_quantum = new_val / ustick;
hogticks = 2 * sched_quantum;
return (0);
}

@ -326,8 +324,6 @ sleep_gdinit(globaldata_t gd)

if (gd->gd_cpuid == 0) {
          sched_quantum = (hz + 24) / 25;
-        hogticks = 2 * sched_quantum;

          gd>gd_tsleep_hash = slpque_cpu0;
      } else {
          gd->gd_tsleep_hash = kmalloc(sizeof(slpque_cpu0), 
diff --git a/sys/sys/proc.h b/sys/sys/proc.h
index fe239b3..c326be5 100644
--- a/sys/sys/proc.h
+++ b/sys/sys/proc.h
@ -498,7 +498,6 @ extern void stopevent(struct proc*, unsigned int, unsigned int);
  extern struct proc proc0;        /* Process slot for swapper. /
  extern struct lwp lwp0;            / LWP slot for swapper. /
  extern struct thread thread0;        / Thread slot for swapper. /
extern int hogticks;            / Limit on kernel cpu hogs. /
  extern int nprocs, maxproc;        / Current and max number of procs. /
  extern int maxprocperuid;        / Max procs per uid. /
  extern int sched_quantum;        / Scheduling quantum in ticks */
- 
2.1.0