The first three patches fix bugs that prevent NFSD's backchannel from reliably retransmitting after a client reconnects. These fixes might be appropriate for 6.8-rc. Following that are some new trace points that might be helpful for field troubleshooting. Then there are some minor clean-ups. I am still testing this series, and there is one msleep() call that needs some thought. Thoughts, comments, opinions, rotten fruit? You know the drill. --- Chuck Lever (13): NFSD: Reset cb_seq_status after NFS4ERR_DELAY NFSD: Reschedule CB operations when backchannel rpc_clnt is shut down NFSD: Retransmit callbacks after client reconnects NFSD: Add nfsd_seq4_status trace event NFSD: Replace dprintks in nfsd4_cb_sequence_done() NFSD: Rename nfsd_cb_state trace point NFSD: Add callback operation lifetime trace points SUNRPC: Remove EXPORT_SYMBOL_GPL for svc_process_bc() NFSD: Remove unused @reason argument NFSD: Replace comment with lockdep assertion NFSD: Remove BUG_ON in nfsd4_process_cb_update() SUNRPC: Remove stale comments NFSD: Remove redundant cb_seq_status initialization fs/nfsd/nfs4callback.c | 81 +++++++++++++------- fs/nfsd/nfs4state.c | 1 + fs/nfsd/trace.h | 162 ++++++++++++++++++++++++++++++++++++++- include/trace/misc/nfs.h | 34 ++++++++ net/sunrpc/svc.c | 1 - net/sunrpc/xprtsock.c | 9 --- 6 files changed, 250 insertions(+), 38 deletions(-) -- Chuck Lever