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Set P_NOLOAD on the pagezero kthread so that it doesn't artificially skew

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the loadav.  This is not real load.  If you have a nice process running in
the background, pagezero may sit in the run queue for ages and add one to
the loadav, and thereby affecting other scheduling decisions.
This commit is contained in:
Peter Wemm 2002-07-19 21:06:01 +00:00
parent 4aca0b1510
commit 16e12eab5a
1 changed files with 7 additions and 1 deletions
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8
sys/vm/vm_zeroidle.c
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@ -107,17 +107,23 @@ vm_page_zero_idle_wakeup(void)
static void
vm_pagezero(void)
{
struct thread *td = curthread;
struct thread *td;
struct proc *p;
struct rtprio rtp;
int pages = 0;
int pri;
td = curthread;
p = td->td_proc;
rtp.prio = RTP_PRIO_MAX;
rtp.type = RTP_PRIO_IDLE;
mtx_lock_spin(&sched_lock);
rtp_to_pri(&rtp, td->td_ksegrp);
pri = td->td_priority;
mtx_unlock_spin(&sched_lock);
PROC_LOCK(p);
p->p_flag |= P_NOLOAD;
PROC_UNLOCK(p);
for (;;) {
if (vm_page_zero_check()) {