tracepoint: add tracepoints for debugging oom_score_adj

[deliverable/linux.git] / kernel / fork.c

diff --git a/kernel/fork.c b/kernel/fork.c
index b058c5820ecd9f0dacaa66db83150e5f2510083f..5e1391b5ade05848e9b9abbe555ebf99eec7be27 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -76,6 +76,9 @@
 
 #include <trace/events/sched.h>
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/task.h>
+
 /*
  * Protected counters by write_lock_irq(&tasklist_lock)
  */
@@ -972,7 +975,7 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
        sched_autogroup_fork(sig);
 
 #ifdef CONFIG_CGROUPS
-       init_rwsem(&sig->threadgroup_fork_lock);
+       init_rwsem(&sig->group_rwsem);
 #endif
 
        sig->oom_adj = current->signal->oom_adj;
@@ -992,7 +995,6 @@ static void copy_flags(unsigned long clone_flags, struct task_struct *p)
        new_flags |= PF_FORKNOEXEC;
        new_flags |= PF_STARTING;
        p->flags = new_flags;
-       clear_freeze_flag(p);
 }
 
 SYSCALL_DEFINE1(set_tid_address, int __user *, tidptr)
@@ -1154,7 +1156,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
        p->io_context = NULL;
        p->audit_context = NULL;
        if (clone_flags & CLONE_THREAD)
-               threadgroup_fork_read_lock(current);
+               threadgroup_change_begin(current);
        cgroup_fork(p);
 #ifdef CONFIG_NUMA
        p->mempolicy = mpol_dup(p->mempolicy);
@@ -1369,8 +1371,11 @@ static struct task_struct *copy_process(unsigned long clone_flags,
        proc_fork_connector(p);
        cgroup_post_fork(p);
        if (clone_flags & CLONE_THREAD)
-               threadgroup_fork_read_unlock(current);
+               threadgroup_change_end(current);
        perf_event_fork(p);
+
+       trace_task_newtask(p, clone_flags);
+
        return p;
 
 bad_fork_free_pid:
@@ -1404,7 +1409,7 @@ bad_fork_cleanup_policy:
 bad_fork_cleanup_cgroup:
 #endif
        if (clone_flags & CLONE_THREAD)
-               threadgroup_fork_read_unlock(current);
+               threadgroup_change_end(current);
        cgroup_exit(p, cgroup_callbacks_done);
        delayacct_tsk_free(p);
        module_put(task_thread_info(p)->exec_domain->module);