block: initial patch for on-stack per-task plugging

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

diff --git a/kernel/exit.c b/kernel/exit.c
index 89c74861a3da94ea6b21720b40f59ce69a42b918..6a488ad2dce5bf9a1b6ba24376e1449e603687e4 100644 (file)
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -908,6 +908,7 @@ NORET_TYPE void do_exit(long code)
        profile_task_exit(tsk);
 
        WARN_ON(atomic_read(&tsk->fs_excl));
+       WARN_ON(blk_needs_flush_plug(tsk));
 
        if (unlikely(in_interrupt()))
                panic("Aiee, killing interrupt handler!");
@@ -994,6 +995,15 @@ NORET_TYPE void do_exit(long code)
        exit_fs(tsk);
        check_stack_usage();
        exit_thread();
+
+       /*
+        * Flush inherited counters to the parent - before the parent
+        * gets woken up by child-exit notifications.
+        *
+        * because of cgroup mode, must be called before cgroup_exit()
+        */
+       perf_event_exit_task(tsk);
+
        cgroup_exit(tsk, 1);
 
        if (group_dead)
@@ -1007,11 +1017,6 @@ NORET_TYPE void do_exit(long code)
         * FIXME: do that only when needed, using sched_exit tracepoint
         */
        flush_ptrace_hw_breakpoint(tsk);
-       /*
-        * Flush inherited counters to the parent - before the parent
-        * gets woken up by child-exit notifications.
-        */
-       perf_event_exit_task(tsk);
 
        exit_notify(tsk, group_dead);
 #ifdef CONFIG_NUMA