sync code with last improvements from OpenBSD
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parent
0e5a54c21a
commit
9bb7c570b7
GPG key ID:
F42C07F07E2E35B7
33 changed files with 1190 additions and 596 deletions
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@ -1,4 +1,4 @@
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/* $OpenBSD: kern_exit.c,v 1.213 2023/09/04 13:18:41 claudio Exp $ */
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/* $OpenBSD: kern_exit.c,v 1.214 2023/09/08 09:06:31 claudio Exp $ */
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/* $NetBSD: kern_exit.c,v 1.39 1996/04/22 01:38:25 christos Exp $ */
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/*
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@ -157,12 +157,10 @@ exit1(struct proc *p, int xexit, int xsig, int flags)
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}
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/* unlink ourselves from the active threads */
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SCHED_LOCK(s);
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TAILQ_REMOVE(&pr->ps_threads, p, p_thr_link);
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SCHED_UNLOCK(s);
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mtx_enter(&pr->ps_mtx);
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TAILQ_REMOVE(&pr->ps_threads, p, p_thr_link);
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pr->ps_threadcnt--;
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wake = (pr->ps_single && pr->ps_singlecnt == pr->ps_threadcnt);
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mtx_leave(&pr->ps_mtx);
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if (wake)
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@ -170,9 +168,11 @@ exit1(struct proc *p, int xexit, int xsig, int flags)
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if ((p->p_flag & P_THREAD) == 0) {
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/* main thread gotta wait because it has the pid, et al */
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/* XXX locking depends on kernel lock here. */
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mtx_enter(&pr->ps_mtx);
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while (pr->ps_threadcnt > 0)
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tsleep_nsec(&pr->ps_threads, PWAIT, "thrdeath", INFSLP);
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msleep_nsec(&pr->ps_threads, &pr->ps_mtx, PWAIT,
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"thrdeath", INFSLP);
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mtx_leave(&pr->ps_mtx);
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if (pr->ps_flags & PS_PROFIL)
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stopprofclock(pr);
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}
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@ -345,8 +345,10 @@ exit1(struct proc *p, int xexit, int xsig, int flags)
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/* just a thread? detach it from its process */
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if (p->p_flag & P_THREAD) {
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/* scheduler_wait_hook(pr->ps_mainproc, p); XXX */
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mtx_enter(&pr->ps_mtx);
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if (pr->ps_threadcnt == 0)
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wakeup(&pr->ps_threads);
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mtx_leave(&pr->ps_mtx);
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}
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/* Release the thread's read reference of resource limit structure. */
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@ -1,4 +1,4 @@
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/* $OpenBSD: kern_fork.c,v 1.250 2023/09/04 13:18:41 claudio Exp $ */
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/* $OpenBSD: kern_fork.c,v 1.251 2023/09/08 09:06:31 claudio Exp $ */
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/* $NetBSD: kern_fork.c,v 1.29 1996/02/09 18:59:34 christos Exp $ */
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/*
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@ -519,7 +519,7 @@ thread_fork(struct proc *curp, void *stack, void *tcb, pid_t *tidptr,
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struct proc *p;
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pid_t tid;
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vaddr_t uaddr;
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int s, error;
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int error;
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if (stack == NULL)
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return EINVAL;
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@ -561,11 +561,8 @@ thread_fork(struct proc *curp, void *stack, void *tcb, pid_t *tidptr,
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LIST_INSERT_HEAD(&allproc, p, p_list);
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LIST_INSERT_HEAD(TIDHASH(p->p_tid), p, p_hash);
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SCHED_LOCK(s);
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TAILQ_INSERT_TAIL(&pr->ps_threads, p, p_thr_link);
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SCHED_UNLOCK(s);
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mtx_enter(&pr->ps_mtx);
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TAILQ_INSERT_TAIL(&pr->ps_threads, p, p_thr_link);
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pr->ps_threadcnt++;
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/*
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@ -1,4 +1,4 @@
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/* $OpenBSD: kern_resource.c,v 1.78 2023/08/29 16:19:34 claudio Exp $ */
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/* $OpenBSD: kern_resource.c,v 1.79 2023/09/08 09:06:31 claudio Exp $ */
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/* $NetBSD: kern_resource.c,v 1.38 1996/10/23 07:19:38 matthias Exp $ */
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/*-
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@ -212,11 +212,13 @@ donice(struct proc *curp, struct process *chgpr, int n)
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if (n < chgpr->ps_nice && suser(curp))
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return (EACCES);
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chgpr->ps_nice = n;
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SCHED_LOCK(s);
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mtx_enter(&chgpr->ps_mtx);
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TAILQ_FOREACH(p, &chgpr->ps_threads, p_thr_link) {
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SCHED_LOCK(s);
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setpriority(p, p->p_estcpu, n);
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SCHED_UNLOCK(s);
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}
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SCHED_UNLOCK(s);
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mtx_leave(&chgpr->ps_mtx);
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return (0);
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}
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@ -476,8 +478,9 @@ dogetrusage(struct proc *p, int who, struct rusage *rup)
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struct process *pr = p->p_p;
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struct proc *q;
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switch (who) {
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KERNEL_ASSERT_LOCKED();
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switch (who) {
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case RUSAGE_SELF:
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/* start with the sum of dead threads, if any */
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if (pr->ps_ru != NULL)
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@ -1,4 +1,4 @@
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/* $OpenBSD: kern_sig.c,v 1.314 2023/09/04 13:18:41 claudio Exp $ */
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/* $OpenBSD: kern_sig.c,v 1.315 2023/09/08 09:06:31 claudio Exp $ */
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/* $NetBSD: kern_sig.c,v 1.54 1996/04/22 01:38:32 christos Exp $ */
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/*
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@ -2105,12 +2105,11 @@ single_thread_set(struct proc *p, enum single_thread_mode mode, int wait)
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}
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pr->ps_singlecnt = 1; /* count ourselfs in already */
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pr->ps_single = p;
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mtx_leave(&pr->ps_mtx);
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SCHED_LOCK(s);
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TAILQ_FOREACH(q, &pr->ps_threads, p_thr_link) {
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if (q == p)
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continue;
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SCHED_LOCK(s);
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if (q->p_flag & P_WEXIT) {
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if (mode == SINGLE_EXIT && q->p_stat == SSTOP)
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setrunnable(q);
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@ -2146,10 +2145,9 @@ single_thread_set(struct proc *p, enum single_thread_mode mode, int wait)
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signotify(q);
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break;
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}
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SCHED_UNLOCK(s);
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}
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SCHED_UNLOCK(s);
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mtx_enter(&pr->ps_mtx);
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pr->ps_singlecnt += count;
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mtx_leave(&pr->ps_mtx);
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@ -2194,11 +2192,10 @@ single_thread_clear(struct proc *p, int flag)
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KASSERT(pr->ps_single == p);
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KASSERT(curproc == p);
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/* can do this without holding pr->ps_mtx since no concurrency */
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mtx_enter(&pr->ps_mtx);
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pr->ps_single = NULL;
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atomic_clearbits_int(&pr->ps_flags, PS_SINGLEUNWIND | PS_SINGLEEXIT);
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SCHED_LOCK(s);
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TAILQ_FOREACH(q, &pr->ps_threads, p_thr_link) {
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if (q == p || (q->p_flag & P_SUSPSINGLE) == 0)
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continue;
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@ -2209,6 +2206,7 @@ single_thread_clear(struct proc *p, int flag)
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* then clearing that either makes it runnable or puts
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* it back into some sleep queue
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*/
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SCHED_LOCK(s);
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if (q->p_stat == SSTOP && (q->p_flag & flag) == 0) {
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if (q->p_wchan == NULL)
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setrunnable(q);
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@ -2217,8 +2215,9 @@ single_thread_clear(struct proc *p, int flag)
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q->p_stat = SSLEEP;
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}
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}
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SCHED_UNLOCK(s);
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}
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SCHED_UNLOCK(s);
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mtx_leave(&pr->ps_mtx);
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}
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void
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@ -1,4 +1,4 @@
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/* $OpenBSD: kern_synch.c,v 1.198 2023/08/16 07:55:52 claudio Exp $ */
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/* $OpenBSD: kern_synch.c,v 1.199 2023/09/08 09:06:31 claudio Exp $ */
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/* $NetBSD: kern_synch.c,v 1.37 1996/04/22 01:38:37 christos Exp $ */
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/*
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@ -566,15 +566,18 @@ sys_sched_yield(struct proc *p, void *v, register_t *retval)
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uint8_t newprio;
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int s;
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SCHED_LOCK(s);
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/*
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* If one of the threads of a multi-threaded process called
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* sched_yield(2), drop its priority to ensure its siblings
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* can make some progress.
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*/
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mtx_enter(&p->p_p->ps_mtx);
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newprio = p->p_usrpri;
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TAILQ_FOREACH(q, &p->p_p->ps_threads, p_thr_link)
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newprio = max(newprio, q->p_runpri);
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mtx_leave(&p->p_p->ps_mtx);
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SCHED_LOCK(s);
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setrunqueue(p->p_cpu, p, newprio);
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p->p_ru.ru_nvcsw++;
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mi_switch();
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