Description of problem: Setting "ms_async_affinitiy_cores" doesn't make worker threads to bind to cores. Version-Release number of selected component (if applicable): 12.2.1-39redhat1xenial How reproducible: Always Steps to Reproduce: 1.I have set the following ms_async config in conf file. ms_async_max_op_threads=8 ms_async_op_threads=5 ms_async_affinity_cores=1,4 ms async set affinity=true If above syntax is correct then all the async worker threads should be bound to core 1-4, but something different is happening. Here is the output "top -H -p <pid>". last field is the core. 87381 1 64045 ceph ceph ? 0:00.02 0.0 0.6 S msgr-worker-0 4 87382 1 64045 ceph ceph ? 0:00.02 0.0 0.6 S msgr-worker-1 10 87383 1 64045 ceph ceph ? 0:00.04 0.3 0.6 S msgr-worker-2 2 87384 1 64045 ceph ceph ? 0:00.04 0.0 0.6 S msgr-worker-3 5 87385 1 64045 ceph ceph ? 0:00.02 0.0 0.6 S msgr-worker-4 3 affinity parameter is not obeyed. This is on a cpu with 12 cores. Am I missing something very basic.