Merged in master, stable-2.11, stable-2.10, and stable-2.9.

Thanks,
Jérémie

On Mon, Sep 10, 2018 at 08:09:14PM -0400, Jonathan Rajotte wrote:
> The live timer can hold the stream lock while sending empty beacon. An empty 
> beacon
> does not mean that data is still pending for the stream.
> 
> Signed-off-by: Jonathan Rajotte <jonathan.rajotte-jul...@efficios.com>
> ---
>  src/common/consumer/consumer.c | 34 +---------------------------------
>  1 file changed, 1 insertion(+), 33 deletions(-)
> 
> diff --git a/src/common/consumer/consumer.c b/src/common/consumer/consumer.c
> index 0cfbf5c7c..66f10c780 100644
> --- a/src/common/consumer/consumer.c
> +++ b/src/common/consumer/consumer.c
> @@ -3668,34 +3668,6 @@ error_nosignal:
>       }
>  }
>  
> -/*
> - * Try to lock the stream mutex.
> - *
> - * On success, 1 is returned else 0 indicating that the mutex is NOT lock.
> - */
> -static int stream_try_lock(struct lttng_consumer_stream *stream)
> -{
> -     int ret;
> -
> -     assert(stream);
> -
> -     /*
> -      * Try to lock the stream mutex. On failure, we know that the stream is
> -      * being used else where hence there is data still being extracted.
> -      */
> -     ret = pthread_mutex_trylock(&stream->lock);
> -     if (ret) {
> -             /* For both EBUSY and EINVAL error, the mutex is NOT locked. */
> -             ret = 0;
> -             goto end;
> -     }
> -
> -     ret = 1;
> -
> -end:
> -     return ret;
> -}
> -
>  /*
>   * Search for a relayd associated to the session id and return the reference.
>   *
> @@ -3779,11 +3751,7 @@ int consumer_data_pending(uint64_t id)
>                       ht->hash_fct(&id, lttng_ht_seed),
>                       ht->match_fct, &id,
>                       &iter.iter, stream, node_session_id.node) {
> -             /* If this call fails, the stream is being used hence data 
> pending. */
> -             ret = stream_try_lock(stream);
> -             if (!ret) {
> -                     goto data_pending;
> -             }
> +             pthread_mutex_lock(&stream->lock);
>  
>               /*
>                * A removed node from the hash table indicates that the stream 
> has
> -- 
> 2.17.1
> 
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