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Protect p_stat with sched_lock.

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This commit is contained in:
jhb 2000-12-02 03:29:33 +00:00
parent 38089e75e4
commit ab2eeae118
1 changed files with 13 additions and 2 deletions
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15
sys/vm/vm_glue.c
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@ -362,6 +362,7 @@ scheduler(dummy)
ppri = INT_MIN;
lockmgr(&allproc_lock, LK_SHARED, NULL, CURPROC);
for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
mtx_enter(&sched_lock, MTX_SPIN);
if (p->p_stat == SRUN &&
(p->p_flag & (P_INMEM | P_SWAPPING)) == 0) {
@ -380,6 +381,7 @@ scheduler(dummy)
ppri = pri;
}
}
mtx_exit(&sched_lock, MTX_SPIN);
}
lockmgr(&allproc_lock, LK_RELEASE, NULL, CURPROC);
@ -450,8 +452,10 @@ int action;
vm = p->p_vmspace;
mtx_enter(&sched_lock, MTX_SPIN);
switch (p->p_stat) {
default:
mtx_exit(&sched_lock, MTX_SPIN);
continue;
case SSLEEP:
@ -459,8 +463,10 @@ int action;
/*
* do not swapout a realtime process
*/
if (RTP_PRIO_IS_REALTIME(p->p_rtprio.type))
if (RTP_PRIO_IS_REALTIME(p->p_rtprio.type)) {
mtx_exit(&sched_lock, MTX_SPIN);
continue;
}
/*
* Do not swapout a process waiting on a critical
@ -468,8 +474,11 @@ int action;
* time in memory.
*/
if (((p->p_priority & 0x7f) < PSOCK) ||
(p->p_slptime < swap_idle_threshold1))
(p->p_slptime < swap_idle_threshold1)) {
mtx_exit(&sched_lock, MTX_SPIN);
continue;
}
mtx_exit(&sched_lock, MTX_SPIN);
/*
* If the system is under memory stress, or if we are swapping
@ -531,10 +540,12 @@ swapout(p)
p->p_vmspace->vm_swrss = vmspace_resident_count(p->p_vmspace);
(void) splhigh();
mtx_enter(&sched_lock, MTX_SPIN);
p->p_flag &= ~P_INMEM;
p->p_flag |= P_SWAPPING;
if (p->p_stat == SRUN)
remrunqueue(p);
mtx_exit(&sched_lock, MTX_SPIN);
(void) spl0();
pmap_swapout_proc(p);