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Take verbal beating by wollman into account and fix DIAGNOSTIC test.

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This version.
1/ avoids garret's introduced  potential page fault. (I got one)
2/ removes compiler warnings

Also fix the tunable scheduling quantum to return a better error code when
fed a bad argument.
This commit is contained in:
Julian Elischer 1997-08-18 01:34:38 +00:00
parent 2eb0f66483
commit ff36905c57
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=28342
1 changed files with 10 additions and 11 deletions
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21
sys/kern/kern_synch.c
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@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)kern_synch.c 8.9 (Berkeley) 5/19/95
* $Id: kern_synch.c,v 1.34 1997/08/13 19:29:33 julian Exp $
* $Id: kern_synch.c,v 1.35 1997/08/16 19:07:20 wollman Exp $
*/
#include "opt_ktrace.h"
@ -84,8 +84,12 @@ sysctl_kern_quantum SYSCTL_HANDLER_ARGS
new_val = quantum;
error = sysctl_handle_int(oidp, &new_val, 0, req);
if ((error == 0) && (new_val > 0) && (new_val < MAXIMUM_SCHEDULE_QUANTUM)) {
quantum = new_val;
if (error == 0) {
if ((new_val > 0) && (new_val < MAXIMUM_SCHEDULE_QUANTUM)) {
quantum = new_val;
} else {
error = EINVAL;
}
}
return (error);
}
@ -201,7 +205,7 @@ schedcpu(arg)
{
register fixpt_t loadfac = loadfactor(averunnable.ldavg[0]);
register struct proc *p;
register int s, i, j;
register int s;
register unsigned int newcpu;
wakeup((caddr_t)&lbolt);
@ -254,7 +258,6 @@ schedcpu(arg)
p->p_priority = p->p_usrpri;
}
splx(s);
not_mine:
}
vmmeter();
timeout(schedcpu, (void *)0, hz);
@ -354,12 +357,8 @@ tsleep(ident, priority, wmesg, timo)
if (ident == NULL || p->p_stat != SRUN)
panic("tsleep");
/* XXX This is not exhaustive, just the most common case */
if ((p->p_procq.tqe_next != NULL)
#if 0 /* XXX this is impossible... the types don't even match */
&& (p->p_procq.tqe_next == p->p_procq.tqe_prev)
#endif
&& (*p->p_procq.tqe_prev == p))
panic("sleeping process on run queue");
if ((p->p_procq.tqe_prev != NULL) && (*p->p_procq.tqe_prev == p))
panic("sleeping process already on another queue");
#endif
p->p_wchan = ident;
p->p_wmesg = wmesg;