Baptiste PELLEGRIN writes via Kernel.org Bugzilla: Hello. Good news for 6.1 kernels. With these patches applied : 8626664c87ee NFSD: Replace dprintks in nfsd4_cb_sequence_done() 961b4b5e86bf NFSD: Reset cb_seq_status after NFS4ERR_DELAY No hangs anymore for me since more than two weeks of server uptime. And previously the hangs occurred every weeks. I just see some suspicious server load maybe caused by the send of RPC_RECALL_ANY to shutdown/suspended/courtesy clients. I see a lot of work on the list that try to address these problems : nfsd: eliminate special handling of NFS4ERR_SEQ_MISORDERED nfsd: handle NFS4ERR_BADSLOT on CB_SEQUENCE better nfsd: when CB_SEQUENCE gets ESERVERFAULT don't increment seq_nr nfsd: only check RPC_SIGNALLED() when restarting rpc_task nfsd: always release slot when requeueing callback nfsd: lift NFSv4.0 handling out of nfsd4_cb_sequence_done() nfsd: prepare nfsd4_cb_sequence_done() for error handling rework NFSD: Skip sending CB_RECALL_ANY when the backchannel isn't up NFSD: fix hang in nfsd4_shutdown_callback Thanks a lot ! Baptiste. View: https://bugzilla.kernel.org/show_bug.cgi?id=219710#c28 You can reply to this message to join the discussion. -- Deet-doot-dot, I am a bot. Kernel.org Bugzilla (bugspray 0.1-dev)