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authorIngo Molnar <mingo@elte.hu>2008-12-19 10:20:42 +0100
committerIngo Molnar <mingo@elte.hu>2008-12-23 12:45:16 +0100
commiteef6cbf5844c620d9db9be99e4908cdf92492fb9 (patch)
treea4601e8d8ce64ca0f23f59b889360d578f663f5b /include/linux/init_task.h
parentaa9c4c0f967fdb482ea95e8473ec3d201e6e0781 (diff)
perfcounters: pull inherited counters
Change counter inheritance from a 'push' to a 'pull' model: instead of child tasks pushing their final counts to the parent, reuse the wait4 infrastructure to pull counters as child tasks are exit-processed, much like how cutime/cstime is collected. Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/init_task.h')
-rw-r--r--include/linux/init_task.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index 23fd8909b9e5..54fa2fa2c8e4 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -113,6 +113,14 @@ extern struct group_info init_groups;
# define CAP_INIT_BSET CAP_INIT_EFF_SET
#endif
+#ifdef CONFIG_PERF_COUNTERS
+# define INIT_PERF_COUNTERS(tsk) \
+ .perf_counter_ctx.counter_list = \
+ LIST_HEAD_INIT(tsk.perf_counter_ctx.counter_list),
+#else
+# define INIT_PERF_COUNTERS(tsk)
+#endif
+
/*
* INIT_TASK is used to set up the first task table, touch at
* your own risk!. Base=0, limit=0x1fffff (=2MB)
@@ -180,6 +188,7 @@ extern struct group_info init_groups;
INIT_IDS \
INIT_TRACE_IRQFLAGS \
INIT_LOCKDEP \
+ INIT_PERF_COUNTERS(tsk) \
}