Use callout_reset instead of timeout(9). Most callouts are statically

allocated, 2 have been added to struct proc for setitimer and sleep.

Reviewed by:	jhb, jlemon

sys/compat/linux/linux_misc.c

@@ -115,9 +115,9 @@ linux_alarm(struct proc *p, struct linux_alarm_args *args)
     old_it = p->p_realtimer;
     getmicrouptime(&tv);
     if (timevalisset(&old_it.it_value))
-	untimeout(realitexpire, (caddr_t)p, p->p_ithandle);
+	callout_stop(&p->p_itcallout);
     if (it.it_value.tv_sec != 0) {
-	p->p_ithandle = timeout(realitexpire, (caddr_t)p, tvtohz(&it.it_value));
+	callout_reset(&p->p_itcallout, tvtohz(&it.it_value), realitexpire, p);
 	timevaladd(&it.it_value, &tv);
     }
     p->p_realtimer = it;

sys/kern/init_main.c

@@ -312,6 +312,9 @@ proc0_init(void *dummy __unused)
 
 	bcopy("swapper", p->p_comm, sizeof ("swapper"));
 
+	callout_init(&p->p_itcallout, 0);
+	callout_init(&p->p_slpcallout, 0);
+
 	/* Create credentials. */
 	cred0.p_refcnt = 1;
 	cred0.p_uidinfo = uifind(0);

sys/kern/kern_acct.c

@@ -77,11 +77,9 @@ static comp_t	encode_comp_t __P((u_long, u_long));
 static void	acctwatch __P((void *));
 
 /*
- * Accounting callout handle used for periodic scheduling of
- * acctwatch.
+ * Accounting callout used for periodic scheduling of acctwatch.
  */
-static struct	callout_handle acctwatch_handle
-    = CALLOUT_HANDLE_INITIALIZER(&acctwatch_handle);
+static struct	callout acctwatch_callout;
 
 /*
  * Accounting vnode pointer, and saved vnode pointer.
@@ -148,7 +146,7 @@ acct(a1, uap)
 	 * close the file, and (if no new file was specified, leave).
 	 */
 	if (acctp != NULLVP || savacctp != NULLVP) {
-		untimeout(acctwatch, NULL, acctwatch_handle);
+		callout_stop(&acctwatch_callout);
 		error = vn_close((acctp != NULLVP ? acctp : savacctp), FWRITE,
 		    p->p_ucred, p);
 		acctp = savacctp = NULLVP;
@@ -161,6 +159,7 @@ acct(a1, uap)
 	 * free space watcher.
 	 */
 	acctp = nd.ni_vp;
+	callout_init(&acctwatch_callout, 0);
 	acctwatch(NULL);
 	return (error);
 }
@@ -329,5 +328,5 @@ acctwatch(a)
 			log(LOG_NOTICE, "Accounting suspended\n");
 		}
 	}
-	acctwatch_handle = timeout(acctwatch, NULL, acctchkfreq * hz);
+	callout_reset(&acctwatch_callout, acctchkfreq * hz, acctwatch, NULL);
 }

sys/kern/kern_exit.c

@@ -172,7 +172,7 @@ exit1(p, rv)
 	p->p_flag |= P_WEXIT;
 	SIGEMPTYSET(p->p_siglist);
 	if (timevalisset(&p->p_realtimer.it_value))
-		untimeout(realitexpire, (caddr_t)p, p->p_ithandle);
+		callout_stop(&p->p_itcallout);
 
 	/*
 	 * Reset any sigio structures pointing to us as a result of

sys/kern/kern_fork.c

@@ -483,6 +483,9 @@ fork1(p1, flags, procp)
 	LIST_INIT(&p2->p_heldmtx);
 	LIST_INIT(&p2->p_contested);
 
+	callout_init(&p2->p_itcallout, 0);
+	callout_init(&p2->p_slpcallout, 0);
+
 #ifdef KTRACE
 	/*
 	 * Copy traceflag and tracefile if enabled.

sys/kern/kern_synch.c

@@ -70,6 +70,9 @@ int	hogticks;
 int	lbolt;
 int	sched_quantum;		/* Roundrobin scheduling quantum in ticks. */
 
+static struct callout schedcpu_callout;
+static struct callout roundrobin_callout;
+
 static int	curpriority_cmp __P((struct proc *p));
 static void	endtsleep __P((void *));
 static void	maybe_resched __P((struct proc *chk));
@@ -175,7 +178,7 @@ roundrobin(arg)
  		need_resched();
 #endif
 
- 	timeout(roundrobin, NULL, sched_quantum);
+	callout_reset(&roundrobin_callout, sched_quantum, roundrobin, NULL);
 }
 
 /*
@@ -344,7 +347,7 @@ schedcpu(arg)
 	lockmgr(&allproc_lock, LK_RELEASE, NULL, CURPROC);
 	vmmeter();
 	wakeup((caddr_t)&lbolt);
-	timeout(schedcpu, (void *)0, hz);
+	callout_reset(&schedcpu_callout, hz, schedcpu, NULL);
 }
 
 /*
@@ -414,7 +417,6 @@ msleep(ident, mtx, priority, wmesg, timo)
 {
 	struct proc *p = curproc;
 	int s, sig, catch = priority & PCATCH;
-	struct callout_handle thandle;
 	int rval = 0;
 	WITNESS_SAVE_DECL(mtx);
 
@@ -465,7 +467,7 @@ msleep(ident, mtx, priority, wmesg, timo)
 		p, p->p_pid, p->p_comm, (void *) sched_lock.mtx_lock);
 	TAILQ_INSERT_TAIL(&slpque[LOOKUP(ident)], p, p_slpq);
 	if (timo)
-		thandle = timeout(endtsleep, (void *)p, timo);
+		callout_reset(&p->p_slpcallout, timo, endtsleep, p);
 	/*
 	 * We put ourselves on the sleep queue and start our timeout
 	 * before calling CURSIG, as we could stop there, and a wakeup
@@ -517,7 +519,7 @@ msleep(ident, mtx, priority, wmesg, timo)
 			goto out;
 		}
 	} else if (timo)
-		untimeout(endtsleep, (void *)p, thandle);
+		callout_stop(&p->p_slpcallout);
 	mtx_exit(&sched_lock, MTX_SPIN);
 
 	if (catch && (sig != 0 || (sig = CURSIG(p)))) {
@@ -628,7 +630,6 @@ mawait(struct mtx *mtx, int priority, int timo)
 	s = splhigh();
 
 	if (p->p_wchan != NULL) {
-		struct callout_handle thandle;
 		int sig;
 		int catch;
 
@@ -646,7 +647,7 @@ mawait(struct mtx *mtx, int priority, int timo)
 		 */
 
 		if (timo)
-			thandle = timeout(endtsleep, (void *)p, timo);
+			callout_reset(&p->p_slpcallout, timo, endtsleep, p);
 
 		sig = 0;
 		catch = priority & PCATCH;
@@ -687,7 +688,7 @@ mawait(struct mtx *mtx, int priority, int timo)
 				goto out;
 			}
 		} else if (timo)
-			untimeout(endtsleep, (void *)p, thandle);
+			callout_stop(&p->p_slpcallout);
 		mtx_exit(&sched_lock, MTX_SPIN);
 
 		if (catch && (sig != 0 || (sig = CURSIG(p)))) {
@@ -1036,6 +1037,10 @@ static void
 sched_setup(dummy)
 	void *dummy;
 {
+
+	callout_init(&schedcpu_callout, 1);
+	callout_init(&roundrobin_callout, 0);
+
 	/* Kick off timeout driven events by calling first time. */
 	roundrobin(NULL);
 	schedcpu(NULL);

sys/kern/kern_time.c

@@ -513,10 +513,10 @@ setitimer(p, uap)
 	s = splclock(); /* XXX: still needed ? */
 	if (uap->which == ITIMER_REAL) {
 		if (timevalisset(&p->p_realtimer.it_value))
-			untimeout(realitexpire, (caddr_t)p, p->p_ithandle);
+			callout_stop(&p->p_itcallout);
 		if (timevalisset(&aitv.it_value)) 
-			p->p_ithandle = timeout(realitexpire, (caddr_t)p,
-						tvtohz(&aitv.it_value));
+			callout_reset(&p->p_itcallout, tvtohz(&aitv.it_value),
+			    realitexpire, p);
 		getmicrouptime(&ctv);
 		timevaladd(&aitv.it_value, &ctv);
 		p->p_realtimer = aitv;
@@ -560,8 +560,8 @@ realitexpire(arg)
 		if (timevalcmp(&p->p_realtimer.it_value, &ctv, >)) {
 			ntv = p->p_realtimer.it_value;
 			timevalsub(&ntv, &ctv);
-			p->p_ithandle = timeout(realitexpire, (caddr_t)p,
-			    tvtohz(&ntv) - 1);
+			callout_reset(&p->p_itcallout, tvtohz(&ntv) - 1,
+			    realitexpire, p);
 			splx(s);
 			return;
 		}

sys/kern/uipc_domain.c

@@ -61,6 +61,9 @@
 static void domaininit __P((void *));
 SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL)
 
+static struct callout pffast_callout;
+static struct callout pfslow_callout;
+
 static void	pffasttimo __P((void *));
 static void	pfslowtimo __P((void *));
 
@@ -137,8 +140,11 @@ domaininit(void *dummy)
 	if (max_linkhdr < 16)		/* XXX */
 		max_linkhdr = 16;
 
-	timeout(pffasttimo, (void *)0, 1);
-	timeout(pfslowtimo, (void *)0, 1);
+	callout_init(&pffast_callout, 0);
+	callout_init(&pfslow_callout, 0);
+
+	callout_reset(&pffast_callout, 1, pffasttimo, NULL);
+	callout_reset(&pfslow_callout, 1, pfslowtimo, NULL);
 }
 
 
@@ -214,7 +220,7 @@ pfslowtimo(arg)
 		for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
 			if (pr->pr_slowtimo)
 				(*pr->pr_slowtimo)();
-	timeout(pfslowtimo, (void *)0, hz/2);
+	callout_reset(&pfslow_callout, hz/2, pfslowtimo, NULL);
 }
 
 static void
@@ -228,5 +234,5 @@ pffasttimo(arg)
 		for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
 			if (pr->pr_fasttimo)
 				(*pr->pr_fasttimo)();
-	timeout(pffasttimo, (void *)0, hz/5);
+	callout_reset(&pffast_callout, hz/5, pffasttimo, NULL);
 }

sys/sys/proc.h

@@ -43,7 +43,7 @@
 #define	_SYS_PROC_H_
 
 #include <machine/proc.h>		/* Machine-dependent proc substruct. */
-#include <sys/callout.h>		/* For struct callout_handle. */
+#include <sys/callout.h>		/* For struct callout. */
 #include <sys/filedesc.h>
 #include <sys/lock.h>			/* For lockmgr. */
 #include <sys/queue.h>
@@ -157,10 +157,6 @@ struct	proc {
 	LIST_ENTRY(proc) p_sibling;	/* List of sibling processes. */
 	LIST_HEAD(, proc) p_children;	/* Pointer to list of children. */
 
-	struct callout_handle p_ithandle; /*
-					      * Callout handle for scheduling
-					      * p_realtimer.
-					      */
 /* The following fields are all zeroed upon creation in fork. */
 #define	p_startzero	p_oppid
 
@@ -173,11 +169,13 @@ struct	proc {
 	u_int	p_estcpu;	 /* Time averaged value of p_cpticks. */
 	int	p_cpticks;	 /* Ticks of cpu time. */
 	fixpt_t	p_pctcpu;	 /* %cpu for this process during p_swtime */
+	struct	callout p_slpcallout;	/* Callout for sleep. */
 	void	*p_wchan;	 /* Sleep address. */
 	const char *p_wmesg;	 /* Reason for sleep. */
 	u_int	p_swtime;	 /* Time swapped in or out. */
 	u_int	p_slptime;	 /* Time since last blocked. */
 
+	struct	callout p_itcallout;	/* Interval timer callout. */
 	struct	itimerval p_realtimer;	/* Alarm timer. */
 	u_int64_t p_runtime;		/* Real time in microsec. */
 	u_int64_t p_uu;			/* Previous user time in microsec. */