This will be used in next patch to ensure synchronous
threads wait until any background operations are done
before freeing its request memory, and also to print
errors if internal channels have outstanding
requests when freed.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I24bc8096f84b70270f87b051f9034ed08e639500
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/451780
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
b282c927ea