Hi, I'm running CentOS 6.5 as NFS server (v3 and v4) and exporting Ext4 and XFS filesystem. After many months that all works fine today the server crash: Jan 30 09:46:13 qb-storage kernel: ------------[ cut here ]------------ Jan 30 09:46:13 qb-storage kernel: WARNING: at lib/list_debug.c:26 __list_add+0x6d/0xa0() (Not tainted) Jan 30 09:46:13 qb-storage kernel: Hardware name: PowerEdge Jan 30 09:46:13 qb-storage kernel: list_add corruption. next->prev should be prev (ffff8804366c5df0), but was ffff8803f611fa68. (next=ffff8803f611fa68). Jan 30 09:46:13 qb-storage kernel: Modules linked in: nfsd lockd nfs_acl auth_rpcgss sunrpc act_police cls_basic cls_flow cls_fw cls_u32 sch_tbf sch_prio sch_htb sch_hfsc sch_ingress sch_sfq bridge stp llc xt_statistic xt_time xt_connlimit xt_realm iptable_raw xt_comment xt_recent xt_policy ipt_ULOG ipt_REJECT ipt_REDIRECT ipt_NETMAP ipt_MASQUERADE ipt_ECN ipt_ecn ipt_CLUSTERIP ipt_ah ipt_addrtype xt_set ip_set nf_nat_tftp nf_nat_snmp_basic nf_conntrack_snmp nf_nat_sip nf_nat_pptp nf_nat_proto_gre nf_nat_irc nf_nat_h323 nf_nat_ftp nf_nat_amanda ts_kmp nf_conntrack_amanda nf_conntrack_sane nf_conntrack_tftp nf_conntrack_sip nf_conntrack_proto_udplite nf_conntrack_proto_sctp nf_conntrack_pptp nf_conntrack_proto_gre nf_conntrack_netlink nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_irc nf_conntrack_h323 nf_conntrack_ftp xt_TPROXY nf_tproxy_core nf_defrag_ipv6 xt_tcpmss xt_pkttype xt_physdev xt_owner xt_NFQUEUE xt_NFLOG nfnetlink_log xt_multiport xt_MARK xt_mark xt_mac xt_limit xt_length xt_iprange xt_help Jan 30 09:46:13 qb-storage kernel: er xt_hashlimit xt_DSCP xt_dscp xt_dccp xt_conntrack xt_CONNMARK xt_connmark xt_CLASSIFY xt_AUDIT ipt_LOG xt_state iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack iptable_mangle nfnetlink iptable_filter ip_tables ipv6 xfs exportfs microcode power_meter iTCO_wdt iTCO_vendor_support dcdbas sg bnx2 lpc_ich mfd_core usb_storage ext4 jbd2 mbcache raid1 sr_mod cdrom sd_mod crc_t10dif ahci wmi dm_mirror dm_region_hash dm_log dm_mod [last unloaded: speedstep_lib] Jan 30 09:46:13 qb-storage kernel: Pid: 5759, comm: nfsd4 Not tainted 2.6.32-431.1.2.0.1.el6.x86_64 #1 Jan 30 09:46:13 qb-storage kernel: Call Trace: Jan 30 09:46:13 qb-storage kernel: [<ffffffff81071e27>] ? warn_slowpath_common+0x87/0xc0 Jan 30 09:46:13 qb-storage kernel: [<ffffffff81071f16>] ? warn_slowpath_fmt+0x46/0x50 Jan 30 09:46:13 qb-storage kernel: [<ffffffff81527920>] ? thread_return+0x4e/0x76e Jan 30 09:46:13 qb-storage kernel: [<ffffffff812944ed>] ? __list_add+0x6d/0xa0 Jan 30 09:46:13 qb-storage kernel: [<ffffffffa05bd60a>] ? laundromat_main+0x23a/0x3f0 [nfsd] Jan 30 09:46:13 qb-storage kernel: [<ffffffffa05bd3d0>] ? laundromat_main+0x0/0x3f0 [nfsd] Jan 30 09:46:13 qb-storage kernel: [<ffffffff81094d30>] ? worker_thread+0x170/0x2a0 Jan 30 09:46:13 qb-storage kernel: [<ffffffff8109b2b0>] ? autoremove_wake_function+0x0/0x40 Jan 30 09:46:13 qb-storage kernel: [<ffffffff81094bc0>] ? worker_thread+0x0/0x2a0 Jan 30 09:46:13 qb-storage kernel: [<ffffffff8109af06>] ? kthread+0x96/0xa0 Jan 30 09:46:13 qb-storage kernel: [<ffffffff8100c20a>] ? child_rip+0xa/0x20 Jan 30 09:46:13 qb-storage kernel: [<ffffffff8109ae70>] ? kthread+0x0/0xa0 Jan 30 09:46:13 qb-storage kernel: [<ffffffff8100c200>] ? child_rip+0x0/0x20 Jan 30 09:46:13 qb-storage kernel: ---[ end trace 13fa6e7d5ee2d668 ]--- and: |BUG: soft lockup - CPU#0 stuck for 67s! [nfsd4:3519] The error is exactly like this: https://access.redhat.com/site/solutions/166583 | Does anyone know if the problem is solved and how? Thanks -- Alessio Cecchi is: @ ILS -> http://www.linux.it/~alessice/ on LinkedIn -> http://www.linkedin.com/in/alessice Assistenza Sistemi GNU/Linux -> http://www.cecchi.biz Cloud Email Hosting -> http://www.qboxmail.com @ PLUG -> ex-Presidente, adesso senatore a vita, http://www.prato.linux.it