+#ifndef _LTTNG_WRAPPER_POLL_H
+#define _LTTNG_WRAPPER_POLL_H
+
/*
- * wrapper/poll.h
- *
- * Copyright (C) 2010-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2011 Mathieu Desnoyers (mathieu.desnoyers@efficios.com)
*
* Dual LGPL v2.1/GPL v2 license.
*/
-#ifndef CONFIG_LIB_RING_BUFFER
#include <linux/poll.h>
-#warning "poll_wait_set_exclusive() is defined as no-op. Will increase LTTng overhead. Please consider using the LTTng kernel tree for better results."
-
/*
- * Will cause higher overhead when signalling all possible reader threads when a
- * buffer is ready to be consumed.
+ * Note: poll_wait_set_exclusive() is defined as no-op. Thundering herd
+ * effect can be noticed with large number of consumer threads.
*/
+
#define poll_wait_set_exclusive(poll_table)
-#endif
+#endif /* _LTTNG_WRAPPER_POLL_H */