Currently the namespaces are depopulated in two cases: if the controller
is detached (either due to its hot unplug or RPC call) or due to
"namespace attribute changed" asynchronous event. It means that during
shutdown, when nvme_bdev_ctrlr is destroyed, the namespaces aren't
depopulated.
For regular NVMe namespaces it isn't a big issue, since their only
depopulate task is to unregister bdevs created on that namespace, which
is already done by the bdev layer. However, it can be a problem for
other types of namespaces (e.g. Open Channel), as they might allocate
their own context in nvme_bdev_ns.type_ctx, which, unless the namespace
is depopulated, cannot be freed.
Change-Id: I91c7f2a50b206b45eb5bdcada278d6454c4cf144
Signed-off-by: Konrad Sztyber <konrad.sztyber@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/478190
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
6db4a00c58