sched: rt group scheduling

[linux-2.6-omap-h63xx.git] / kernel / fork.c

diff --git a/kernel/fork.c b/kernel/fork.c
index a65bfc47177ce7e6c3f6bc68fa7a3b3e1a70dbf2..0c969f4fade05391a8faaf6a2ff30ad1837861db 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1045,6 +1045,10 @@ static struct task_struct *copy_process(unsigned long clone_flags,
        copy_flags(clone_flags, p);
        INIT_LIST_HEAD(&p->children);
        INIT_LIST_HEAD(&p->sibling);
+#ifdef CONFIG_PREEMPT_RCU
+       p->rcu_read_lock_nesting = 0;
+       p->rcu_flipctr_idx = 0;
+#endif /* #ifdef CONFIG_PREEMPT_RCU */
        p->vfork_done = NULL;
        spin_lock_init(&p->alloc_lock);
 
@@ -1057,6 +1061,12 @@ static struct task_struct *copy_process(unsigned long clone_flags,
        p->utimescaled = cputime_zero;
        p->stimescaled = cputime_zero;
        p->prev_utime = cputime_zero;
+       p->prev_stime = cputime_zero;
+
+#ifdef CONFIG_DETECT_SOFTLOCKUP
+       p->last_switch_count = 0;
+       p->last_switch_timestamp = 0;
+#endif
 
 #ifdef CONFIG_TASK_XACCT
        p->rchar = 0;           /* I/O counter: bytes read */
@@ -1122,6 +1132,9 @@ static struct task_struct *copy_process(unsigned long clone_flags,
        p->blocked_on = NULL; /* not blocked yet */
 #endif
 
+       /* Perform scheduler related setup. Assign this task to a CPU. */
+       sched_fork(p, clone_flags);
+
        if ((retval = security_task_alloc(p)))
                goto bad_fork_cleanup_policy;
        if ((retval = audit_alloc(p)))
@@ -1211,9 +1224,6 @@ static struct task_struct *copy_process(unsigned long clone_flags,
        INIT_LIST_HEAD(&p->ptrace_children);
        INIT_LIST_HEAD(&p->ptrace_list);
 
-       /* Perform scheduler related setup. Assign this task to a CPU. */
-       sched_fork(p, clone_flags);
-
        /* Now that the task is set up, run cgroup callbacks if
         * necessary. We need to run them before the task is visible
         * on the tasklist. */
@@ -1236,6 +1246,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
         * parent's CPU). This avoids alot of nasty races.
         */
        p->cpus_allowed = current->cpus_allowed;
+       p->rt.nr_cpus_allowed = current->rt.nr_cpus_allowed;
        if (unlikely(!cpu_isset(task_cpu(p), p->cpus_allowed) ||
                        !cpu_online(task_cpu(p))))
                set_task_cpu(p, smp_processor_id());
@@ -1291,23 +1302,14 @@ static struct task_struct *copy_process(unsigned long clone_flags,
                        __ptrace_link(p, current->parent);
 
                if (thread_group_leader(p)) {
-                       if (clone_flags & CLONE_NEWPID) {
+                       if (clone_flags & CLONE_NEWPID)
                                p->nsproxy->pid_ns->child_reaper = p;
-                               p->signal->tty = NULL;
-                               set_task_pgrp(p, p->pid);
-                               set_task_session(p, p->pid);
-                               attach_pid(p, PIDTYPE_PGID, pid);
-                               attach_pid(p, PIDTYPE_SID, pid);
-                       } else {
-                               p->signal->tty = current->signal->tty;
-                               set_task_pgrp(p, task_pgrp_nr(current));
-                               set_task_session(p, task_session_nr(current));
-                               attach_pid(p, PIDTYPE_PGID,
-                                               task_pgrp(current));
-                               attach_pid(p, PIDTYPE_SID,
-                                               task_session(current));
-                       }
 
+                       p->signal->tty = current->signal->tty;
+                       set_task_pgrp(p, task_pgrp_nr(current));
+                       set_task_session(p, task_session_nr(current));
+                       attach_pid(p, PIDTYPE_PGID, task_pgrp(current));
+                       attach_pid(p, PIDTYPE_SID, task_session(current));
                        list_add_tail_rcu(&p->tasks, &init_task.tasks);
                        __get_cpu_var(process_counts)++;
                }