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authorIngo Molnar <mingo@elte.hu>2008-12-17 14:10:57 +0100
committerIngo Molnar <mingo@elte.hu>2008-12-23 12:45:14 +0100
commitaa9c4c0f967fdb482ea95e8473ec3d201e6e0781 (patch)
tree8223d34630b7d3130825e8a2197e9bb51c34b7fa /kernel/exit.c
parent7671581f1666ef4b54a1c1e598c51ac44c060a9b (diff)
downloadop-kernel-dev-aa9c4c0f967fdb482ea95e8473ec3d201e6e0781.zip
op-kernel-dev-aa9c4c0f967fdb482ea95e8473ec3d201e6e0781.tar.gz
perfcounters: fix task clock counter
Impact: fix per task clock counter precision Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/exit.c')
-rw-r--r--kernel/exit.c17
1 files changed, 12 insertions, 5 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index d336c90..244edfd 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -922,6 +922,12 @@ static void exit_notify(struct task_struct *tsk, int group_dead)
forget_original_parent(tsk);
exit_task_namespaces(tsk);
+ /*
+ * Flush inherited counters to the parent - before the parent
+ * gets woken up by child-exit notifications.
+ */
+ perf_counter_exit_task(tsk);
+
write_lock_irq(&tasklist_lock);
if (group_dead)
kill_orphaned_pgrp(tsk->group_leader, NULL);
@@ -1093,11 +1099,6 @@ NORET_TYPE void do_exit(long code)
mpol_put(tsk->mempolicy);
tsk->mempolicy = NULL;
#endif
- /*
- * These must happen late, after the PID is not
- * hashed anymore, but still at a point that may sleep:
- */
- perf_counter_exit_task(tsk);
#ifdef CONFIG_FUTEX
if (unlikely(!list_empty(&tsk->pi_state_list)))
exit_pi_state_list(tsk);
@@ -1121,6 +1122,12 @@ NORET_TYPE void do_exit(long code)
if (tsk->splice_pipe)
__free_pipe_info(tsk->splice_pipe);
+ /*
+ * These must happen late, after the PID is not
+ * hashed anymore, but still at a point that may sleep:
+ */
+ perf_counter_exit_task(tsk);
+
preempt_disable();
/* causes final put_task_struct in finish_task_switch(). */
tsk->state = TASK_DEAD;
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