Hello, We hit some crashes while using nfs-ganesha. From my understanding, it looks like there are some races where an entry is somehow free'd twice. It mostly happen when MDCACHE is in extremis mode. Is it a known issue that would be fixed in next? I couldn't find anything about that. Thanks. You can find backtraces below: nfs-ganesha 2.6.2 #0 rwlock_wrlock_common (rwlock=0xb0, abstime=0x0) at /usr/local/poudriere/jails/filer_stable_11/usr/src/lib/libthr/thread/thr_rwlock.c:58 58 /usr/local/poudriere/jails/filer_stable_11/usr/src/lib/libthr/thread/thr_rwlock.c: No such file or directory. in /usr/local/poudriere/jails/filer_stable_11/usr/src/lib/libthr/thread/thr_rwlock.c (gdb) bt #0 rwlock_wrlock_common (rwlock=0xb0, abstime=0x0) at /usr/local/poudriere/jails/filer_stable_11/usr/src/lib/libthr/thread/thr_rwlock.c:58 #1 0x000000000041b75e in fsal_obj_handle_fini (obj=0xb02534408) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.2.0/src/FSAL/commonlib.c:192 #2 0x00000000004d1b13 in mdcache_lru_clean (entry=0xb02534400) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.2.0/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_lru.c:589 #3 0x00000000004d2467 in _mdcache_lru_unref (entry=0xb02534400, flags=<value optimized out>, func=<value optimized out>, line=<value optimized out>) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.2.0/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_lru.c:1915 #4 0x00000000004d31e4 in lru_reap_impl (qid=LRU_ENTRY_L1) at mdcache_hash.h:238 #5 0x00000000004d166c in mdcache_lru_get () at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.2.0/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_lru.c:717 #6 0x00000000004dc66e in mdcache_new_entry (export=0x802b19b80, sub_handle=0x9a4af9100, attrs_in=0x7fffdbdc43f8, attrs_out=0x0, new_directory=false, entry=0x7fffdbdc4550, state=0x0) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.2.0/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_helpers.c:143 #7 0x00000000004dde9f in mdcache_locate_host (fh_desc=0x7fffdbdc45b0, export=<value optimized out>, entry=0x7fffdbdc4550, attrs_out=0x0) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.2.0/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_helpers.c:1000 #8 0x00000000004d9219 in mdcache_create_handle (exp_hdl=0x802b19b80, fh_desc=<value optimized out>, handle=0x7fffdbdc4590, attrs_out=0x0) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.2.0/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_handle.c:1757 #9 0x000000000045ba9c in nfs4_op_putfh (op=<value optimized out>, data=0x7fffdbdc4a50, resp=0x8b3075de0) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.2.0/src/Protocols/NFS/nfs4_op_putfh.c:211 #10 0x000000000044b5e4 in nfs4_Compound (arg=<value optimized out>, req=<value optimized out>, res=<value optimized out>) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.2.0/src/Protocols/NFS/nfs4_Compound.c:752 #11 0x000000000043db17 in nfs_rpc_process_request (reqdata=<value optimized out>) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.2.0/src/MainNFSD/nfs_worker_thread.c:1329 #12 0x000000000043c98b in nfs_rpc_valid_NFS (req=0x822426000) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.2.0/src/MainNFSD/nfs_worker_thread.c:1554 #13 0x0000000800974a66 in svc_vc_decode (req=0x822426000) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.2.0/src/libntirpc/src/svc_vc.c:815 #14 0x000000000043c418 in nfs_rpc_decode_request (xprt=0x80b919180, xdrs=0xa1e7b86c0) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.2.0/src/MainNFSD/nfs_rpc_dispatcher_thread.c:1317 #15 0x0000000800973f54 in svc_vc_recv (xprt=<value optimized out>) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.2.0/src/libntirpc/src/svc_vc.c:788 #16 0x0000000800972051 in svc_rqst_xprt_task (wpe=<value optimized out>) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.2.0/src/libntirpc/src/svc_rqst.c:750 #17 0x000000080097a2c2 in work_pool_thread (arg=<value optimized out>) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.2.0/src/libntirpc/src/work_pool.c:176 #18 0x000000080159bc06 in thread_start (curthread=0x81ee4ad00) at /usr/local/poudriere/jails/filer_stable_11/usr/src/lib/libthr/thread/thr_create.c:289 #19 0x0000000000000000 in ?? () nfs-ganesha 2.6.1 0 rwlock_wrlock_common (rwlock=0xb0, abstime=0x0) at /usr/local/poudriere/jails/filer_stable_11/usr/src/lib/libthr/thread/thr_rwlock.c:58 1 0x000000000041b75e in fsal_obj_handle_fini (obj=0xa6fb74808) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.1.2/src/FSAL/commonlib.c:192 2 0x00000000004d0f5f in mdcache_lru_clean (entry=0xa6fb74800) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.1.2/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_lru.c:589 3 0x00000000004d1907 in _mdcache_lru_unref (entry=0xa6fb74800, flags=<value optimized out>, func=<value optimized out>, line=<value optimized out>) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.1.2/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_lru.c:1907 4 0x00000000004dbfbc in mdcache_new_entry (export=<value optimized out>, sub_handle=0xa65d7a500, attrs_in=0x7fffdcbd1388, attrs_out=0x0, new_directory=false, entry=0x7fffdcbd14e0, state=0x0) at mdcache_lru.h:190 5 0x00000000004dd23f in mdcache_locate_host (fh_desc=0x7fffdcbd1540, export=<value optimized out>, entry=0x7fffdcbd14e0, attrs_out=0x0) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.1.2/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_helpers.c:999 6 0x00000000004d8599 in mdcache_create_handle (exp_hdl=0x802902080, fh_desc=<value optimized out>, handle=0x7fffdcbd1520, attrs_out=0x0) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.1.2/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_handle.c:1757 7 0x000000000045b40c in nfs4_op_putfh (op=<value optimized out>, data=0x7fffdcbd19e0, resp=0xa8abb94e0) at /wrkdirs/usr/ports/gandi/ganesha/work/ganesha-2.6.1.2/src/Protocols/NFS/nfs4_op_putfh.c:211