Most frequent symptom was a BUG triggering in expire_client, with the server locking up shortly thereafter. Introduced by 508dc6e110c6dbdc0bbe84298ccfe22de7538486 "nfsd41: free_session/free_client must be called under the client_lock".
Unified · Split
| @@ -900,7 +900,7 @@ static void free_session(struct kref *kref) · 899 unmodified lines | ||
| 900 | 900 | struct nfsd4_session *ses; |
| 901 | 901 | int mem; |
| 902 | 902 | |
| 903 | − BUG_ON(!spin_is_locked(&client_lock)); | |
| 903 | + lockdep_assert_held(&client_lock); | |
| 904 | 904 | ses = container_of(kref, struct nfsd4_session, se_ref); |
| 905 | 905 | nfsd4_del_conns(ses); |
| 906 | 906 | spin_lock(&nfsd_drc_lock); |
| @@ -1080,7 +1080,7 @@ static struct nfs4_client *alloc_client(struct xdr_netobj name) · 173 unmodified lines | ||
| 1080 | 1080 | static inline void |
| 1081 | 1081 | free_client(struct nfs4_client *clp) |
| 1082 | 1082 | { |
| 1083 | − BUG_ON(!spin_is_locked(&client_lock)); | |
| 1083 | + lockdep_assert_held(&client_lock); | |
| 1084 | 1084 | while (!list_empty(&clp->cl_sessions)) { |
| 1085 | 1085 | struct nfsd4_session *ses; |
| 1086 | 1086 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, |