The OS is oracle linux 8 with podman-3.4.2-9.0.1.module+el8.5.0+20494+0311868c.x86_64 kernel-4.18.0-348.20.1.el8_5.x86_64 I start a container in a systemd service using: + /usr/bin/podman start cloud-dice And get this error from podman: Error: unable to start container "76e4a2480bc7f81d3baa802f3d48fffc2e3d252a52f33039d83e339d3f158532": failed to mount shm tmpfs "/var/lib/containers/storage/overlay-containers/76e4a2480bc7f81d3baa802f3d48fffc2e3d252a52f33039d83e339d3f158532/userdata/shm": invalid argument And these messages in dmesg: [82521.621247] tmpfs: Unknown parameter 'context' [82521.643785] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [82521.648888] IPv6: ADDRCONF(NETDEV_UP): vethc149f6ee: link is not ready [82521.650561] IPv6: ADDRCONF(NETDEV_CHANGE): vethc149f6ee: link becomes ready [82521.651950] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [82521.654408] cni-podman0: port 1(vethc149f6ee) entered blocking state [82521.655364] cni-podman0: port 1(vethc149f6ee) entered disabled state [82521.656594] device vethc149f6ee entered promiscuous mode [82521.657537] cni-podman0: port 1(vethc149f6ee) entered blocking state [82521.658455] cni-podman0: port 1(vethc149f6ee) entered forwarding state [82521.880289] cni-podman0: port 1(vethc149f6ee) entered disabled state [82521.883696] device vethc149f6ee left promiscuous mode [82521.884435] cni-podman0: port 1(vethc149f6ee) entered disabled state If I rebuild the container then I do not see the tmpfs error and everything works. What do I need to do to fix the "tmpfs: Unknown parameter 'context'" error that I'm assuming is root cause? Barry