Important point: since we needed to change the layout of the
LTTng-UST shared buffers in this release, we had to bump the ABI
major version between LTTng-UST and lttng-sessiond from 7 to 8.
Therefore, if incompatible lttng-ust and lttng-sessiond attempt
to interact, lttng-ust will not perform any tracing. Make sure
you upgrade both lttng-tools and lttng-ust.