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Make sure to lock the proclist when we're traversing allproc.

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This commit is contained in:
thorpej 2000-09-14 19:13:29 +00:00
parent f9c3dbedef
commit 03810b147f
1 changed files with 7 additions and 5 deletions
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12
sys/kern/kern_synch.c
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@ -1,4 +1,4 @@
/* $NetBSD: kern_synch.c,v 1.94 2000/09/05 16:27:52 bouyer Exp $ */ /* $NetBSD: kern_synch.c,v 1.95 2000/09/14 19:13:29 thorpej Exp $ */
/*- /*-
* Copyright (c) 1999, 2000 The NetBSD Foundation, Inc. * Copyright (c) 1999, 2000 The NetBSD Foundation, Inc.
@ -1003,21 +1003,23 @@ schedclock(struct proc *p)
void void
suspendsched() suspendsched()
{ {
int s, i;
struct proc *p, *next; struct proc *p, *next;
SCHED_LOCK(s); int s, i;
/* /*
* Convert all non-P_SYSTEM SSLEEP processes to SSTOP. Curproc is * Convert all non-P_SYSTEM SSLEEP processes to SSTOP. Curproc is
* necesserelly SONPROC. * necesserelly SONPROC.
*/ */
for (p = LIST_FIRST(&allproc); p != NULL; p = next) { proclist_lock_read();
next = LIST_NEXT(p, p_list); SCHED_LOCK(s);
for (p = LIST_FIRST(&allproc); p != NULL; p = LIST_NEXT(p, p_list)) {
if (p->p_stat != SSLEEP || p == curproc || if (p->p_stat != SSLEEP || p == curproc ||
(p->p_flag & P_SYSTEM) != 0) (p->p_flag & P_SYSTEM) != 0)
continue; continue;
p->p_stat = SSTOP; p->p_stat = SSTOP;
} }
proclist_unlock_read();
/* go through the run queues, remove non-P_SYSTEM processes */ /* go through the run queues, remove non-P_SYSTEM processes */
for (i = 0; i < RUNQUE_NQS; i++) { for (i = 0; i < RUNQUE_NQS; i++) {
for (p = (struct proc *)&sched_qs[i]; for (p = (struct proc *)&sched_qs[i];