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Diffstat (limited to 'kernel')
-rw-r--r--kernel/exit.c1
-rw-r--r--kernel/fork.c2
-rw-r--r--kernel/posix-cpu-timers.c23
-rw-r--r--kernel/posix-timers.c2
-rw-r--r--kernel/rcupdate.c11
-rw-r--r--kernel/signal.c14
6 files changed, 32 insertions, 21 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index 43077732619..3b25b182d2b 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -843,6 +843,7 @@ fastcall NORET_TYPE void do_exit(long code)
group_dead = atomic_dec_and_test(&tsk->signal->live);
if (group_dead) {
del_timer_sync(&tsk->signal->real_timer);
+ exit_itimers(tsk->signal);
acct_process(code);
}
exit_mm(tsk);
diff --git a/kernel/fork.c b/kernel/fork.c
index 533ce27f4b2..280bd44ac44 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -848,7 +848,7 @@ static inline void copy_flags(unsigned long clone_flags, struct task_struct *p)
{
unsigned long new_flags = p->flags;
- new_flags &= ~PF_SUPERPRIV;
+ new_flags &= ~(PF_SUPERPRIV | PF_NOFREEZE);
new_flags |= PF_FORKNOEXEC;
if (!(clone_flags & CLONE_PTRACE))
p->ptrace = 0;
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index ad85d3f0dcc..d30b304a338 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -424,6 +424,7 @@ static void cleanup_timers(struct list_head *head,
cputime_t ptime = cputime_add(utime, stime);
list_for_each_entry_safe(timer, next, head, entry) {
+ put_task_struct(timer->task);
timer->task = NULL;
list_del_init(&timer->entry);
if (cputime_lt(timer->expires.cpu, ptime)) {
@@ -436,6 +437,7 @@ static void cleanup_timers(struct list_head *head,
++head;
list_for_each_entry_safe(timer, next, head, entry) {
+ put_task_struct(timer->task);
timer->task = NULL;
list_del_init(&timer->entry);
if (cputime_lt(timer->expires.cpu, utime)) {
@@ -448,6 +450,7 @@ static void cleanup_timers(struct list_head *head,
++head;
list_for_each_entry_safe(timer, next, head, entry) {
+ put_task_struct(timer->task);
timer->task = NULL;
list_del_init(&timer->entry);
if (timer->expires.sched < sched_time) {
@@ -958,14 +961,16 @@ void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec *itp)
static void check_thread_timers(struct task_struct *tsk,
struct list_head *firing)
{
+ int maxfire;
struct list_head *timers = tsk->cpu_timers;
+ maxfire = 20;
tsk->it_prof_expires = cputime_zero;
while (!list_empty(timers)) {
struct cpu_timer_list *t = list_entry(timers->next,
struct cpu_timer_list,
entry);
- if (cputime_lt(prof_ticks(tsk), t->expires.cpu)) {
+ if (!--maxfire || cputime_lt(prof_ticks(tsk), t->expires.cpu)) {
tsk->it_prof_expires = t->expires.cpu;
break;
}
@@ -974,12 +979,13 @@ static void check_thread_timers(struct task_struct *tsk,
}
++timers;
+ maxfire = 20;
tsk->it_virt_expires = cputime_zero;
while (!list_empty(timers)) {
struct cpu_timer_list *t = list_entry(timers->next,
struct cpu_timer_list,
entry);
- if (cputime_lt(virt_ticks(tsk), t->expires.cpu)) {
+ if (!--maxfire || cputime_lt(virt_ticks(tsk), t->expires.cpu)) {
tsk->it_virt_expires = t->expires.cpu;
break;
}
@@ -988,12 +994,13 @@ static void check_thread_timers(struct task_struct *tsk,
}
++timers;
+ maxfire = 20;
tsk->it_sched_expires = 0;
while (!list_empty(timers)) {
struct cpu_timer_list *t = list_entry(timers->next,
struct cpu_timer_list,
entry);
- if (tsk->sched_time < t->expires.sched) {
+ if (!--maxfire || tsk->sched_time < t->expires.sched) {
tsk->it_sched_expires = t->expires.sched;
break;
}
@@ -1010,6 +1017,7 @@ static void check_thread_timers(struct task_struct *tsk,
static void check_process_timers(struct task_struct *tsk,
struct list_head *firing)
{
+ int maxfire;
struct signal_struct *const sig = tsk->signal;
cputime_t utime, stime, ptime, virt_expires, prof_expires;
unsigned long long sched_time, sched_expires;
@@ -1042,12 +1050,13 @@ static void check_process_timers(struct task_struct *tsk,
} while (t != tsk);
ptime = cputime_add(utime, stime);
+ maxfire = 20;
prof_expires = cputime_zero;
while (!list_empty(timers)) {
struct cpu_timer_list *t = list_entry(timers->next,
struct cpu_timer_list,
entry);
- if (cputime_lt(ptime, t->expires.cpu)) {
+ if (!--maxfire || cputime_lt(ptime, t->expires.cpu)) {
prof_expires = t->expires.cpu;
break;
}
@@ -1056,12 +1065,13 @@ static void check_process_timers(struct task_struct *tsk,
}
++timers;
+ maxfire = 20;
virt_expires = cputime_zero;
while (!list_empty(timers)) {
struct cpu_timer_list *t = list_entry(timers->next,
struct cpu_timer_list,
entry);
- if (cputime_lt(utime, t->expires.cpu)) {
+ if (!--maxfire || cputime_lt(utime, t->expires.cpu)) {
virt_expires = t->expires.cpu;
break;
}
@@ -1070,12 +1080,13 @@ static void check_process_timers(struct task_struct *tsk,
}
++timers;
+ maxfire = 20;
sched_expires = 0;
while (!list_empty(timers)) {
struct cpu_timer_list *t = list_entry(timers->next,
struct cpu_timer_list,
entry);
- if (sched_time < t->expires.sched) {
+ if (!--maxfire || sched_time < t->expires.sched) {
sched_expires = t->expires.sched;
break;
}
diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index b7b532acd9f..dda3cda73c7 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -1157,7 +1157,7 @@ retry_delete:
}
/*
- * This is called by __exit_signal, only when there are no more
+ * This is called by do_exit or de_thread, only when there are no more
* references to the shared signal_struct.
*/
void exit_itimers(struct signal_struct *sig)
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index dd99415b155..2559d4b8f23 100644
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -109,6 +109,10 @@ void fastcall call_rcu(struct rcu_head *head,
rdp = &__get_cpu_var(rcu_data);
*rdp->nxttail = head;
rdp->nxttail = &head->next;
+
+ if (unlikely(++rdp->count > 10000))
+ set_need_resched();
+
local_irq_restore(flags);
}
@@ -140,6 +144,12 @@ void fastcall call_rcu_bh(struct rcu_head *head,
rdp = &__get_cpu_var(rcu_bh_data);
*rdp->nxttail = head;
rdp->nxttail = &head->next;
+ rdp->count++;
+/*
+ * Should we directly call rcu_do_batch() here ?
+ * if (unlikely(rdp->count > 10000))
+ * rcu_do_batch(rdp);
+ */
local_irq_restore(flags);
}
@@ -157,6 +167,7 @@ static void rcu_do_batch(struct rcu_data *rdp)
next = rdp->donelist = list->next;
list->func(list);
list = next;
+ rdp->count--;
if (++count >= maxbatch)
break;
}
diff --git a/kernel/signal.c b/kernel/signal.c
index 50c99264377..f2b96b08fb4 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -397,20 +397,8 @@ void __exit_signal(struct task_struct *tsk)
flush_sigqueue(&tsk->pending);
if (sig) {
/*
- * We are cleaning up the signal_struct here. We delayed
- * calling exit_itimers until after flush_sigqueue, just in
- * case our thread-local pending queue contained a queued
- * timer signal that would have been cleared in
- * exit_itimers. When that called sigqueue_free, it would
- * attempt to re-take the tasklist_lock and deadlock. This
- * can never happen if we ensure that all queues the
- * timer's signal might be queued on have been flushed
- * first. The shared_pending queue, and our own pending
- * queue are the only queues the timer could be on, since
- * there are no other threads left in the group and timer
- * signals are constrained to threads inside the group.
+ * We are cleaning up the signal_struct here.
*/
- exit_itimers(sig);
exit_thread_group_keys(sig);
kmem_cache_free(signal_cachep, sig);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 10:26:54 +0000