Fix: do not set quiescent state on channel destroy

Setting the quiescent state to true for each stream at channel
destruction is not useful: there are no readers left anyway at
that stage.

The side-effect perceived of setting this quiescent state on
destroy is that the metadata stream ends up with an empty last
packet (due to flush_empty performed when setting the quiescent state)
which is never consumed. This shows up in the lttng-modules error
reporting.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

diff --git a/lib/ringbuffer/ring_buffer_frontend.c b/lib/ringbuffer/ring_buffer_frontend.c
index 90c665d6e7104c186cfe12ef63bdd399b13ba16e..f367dffc70190c3a040491349bd97eff0778d34d 100644 (file)
--- a/lib/ringbuffer/ring_buffer_frontend.c
+++ b/lib/ringbuffer/ring_buffer_frontend.c
@@ -978,8 +978,6 @@ void *channel_destroy(struct channel *chan)
                                config->cb.buffer_finalize(buf,
                                                           chan->backend.priv,
                                                           cpu);
-                       if (buf->backend.allocated)
-                               lib_ring_buffer_set_quiescent(buf);
                        /*
                         * Perform flush before writing to finalized.
                         */
@@ -992,8 +990,6 @@ void *channel_destroy(struct channel *chan)
 
                if (config->cb.buffer_finalize)
                        config->cb.buffer_finalize(buf, chan->backend.priv, -1);
-               if (buf->backend.allocated)
-                       lib_ring_buffer_set_quiescent(buf);
                /*
                 * Perform flush before writing to finalized.
                 */