Hi, I have a problem on a machine running CentOS 7.0, where the kernel/e1000e reports things like "Detected Hardware Unit Hang:" and "Reset adapter unexpectedly". The kernel version is 3.10.0-123.13.2.el7.x86_64.
I had a similar issue years ago with the same machine running openSUSE 12.3 with kernel 3.7.10, and downgrading to 3.4.47 fixed it completely. At that time, I found this bug reported in fedora, marked as WONTFIX due to the fedora release hitting EoL https://bugzilla.redhat.com/show_bug.cgi?id=785806 and the dmesg output looks similar. And recently I found this old bug for CentOS 6. http://bugs.centos.org/view.php?id=6517 to which I replied but haven't seen any activity there for a week. Years ago on openSUSE 12.3 with kernel 3.7.10, this would eventually make the network fail completely requiring a reboot. So far (up 12 days) the machine with 3.10.x hasn't been disconnected long enough to be noticeable. I have seen http://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git/commit/?id=09357b00255c233705b1cf6d76a8d147340545b8 as mentioned in the fedora bug page, and it appears to already be applied to this kernel. *Here are the details for the machine with the problem: *root@machine:~ # lsb_release -a LSB Version: :core-4.1-amd64:core-4.1-noarch Distributor ID: CentOS Description: CentOS Linux release 7.0.1406 (Core) Release: 7.0.1406 Codename: Core root@machine:~ # uname -a Linux machine.bc.local 3.10.0-123.13.2.el7.x86_64 #1 SMP Thu Dec 18 14:09:13 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux root@machine:~ # lspci -v ... 00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 05) Subsystem: Super Micro Computer Inc Device 1502 Flags: bus master, fast devsel, latency 0, IRQ 42 Memory at dfd00000 (32-bit, non-prefetchable) [size=128K] Memory at dfd25000 (32-bit, non-prefetchable) [size=4K] I/O ports at f020 [size=32] Capabilities: [c8] Power Management version 2 Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [e0] PCI Advanced Features Kernel driver in use: e1000e Here is dmesg right after boot and plugging in network after booted: [ 368.697841] e1000e 0000:00:19.0 com: Detected Hardware Unit Hang: TDH <3d> TDT <67> next_to_use <67> next_to_clean <39> buffer_info[next_to_clean]: time_stamp <1000106e9> next_to_watch <3d> jiffies <100010c60> next_to_watch.status <0> MAC Status <40080083> PHY Status <796d> PHY 1000BASE-T Status <3800> PHY Extended Status <3000> PCI Status <10> [ 370.696960] e1000e 0000:00:19.0 com: Detected Hardware Unit Hang: TDH <3d> TDT <67> next_to_use <67> next_to_clean <39> buffer_info[next_to_clean]: time_stamp <1000106e9> next_to_watch <3d> jiffies <100011430> next_to_watch.status <0> MAC Status <40080083> PHY Status <796d> PHY 1000BASE-T Status <3800> PHY Extended Status <3000> PCI Status <10> [ 372.695807] e1000e 0000:00:19.0 com: Detected Hardware Unit Hang: TDH <3d> TDT <67> next_to_use <67> next_to_clean <39> buffer_info[next_to_clean]: time_stamp <1000106e9> next_to_watch <3d> jiffies <100011c00> next_to_watch.status <0> MAC Status <40080083> PHY Status <796d> PHY 1000BASE-T Status <3800> PHY Extended Status <3000> PCI Status <10> [ 374.694933] e1000e 0000:00:19.0 com: Detected Hardware Unit Hang: TDH <3d> TDT <67> next_to_use <67> next_to_clean <39> buffer_info[next_to_clean]: time_stamp <1000106e9> next_to_watch <3d> jiffies <1000123d0> next_to_watch.status <0> MAC Status <40080083> PHY Status <796d> PHY 1000BASE-T Status <3800> PHY Extended Status <3000> PCI Status <10> [ 374.710096] ------------[ cut here ]------------ [ 374.710124] WARNING: at net/sched/sch_generic.c:259 dev_watchdog+0x270/0x280() [ 374.710128] NETDEV WATCHDOG: com (e1000e): transmit queue 0 timed out [ 374.710131] Modules linked in: binfmt_misc act_police cls_basic cls_flow cls_fw cls_u32 sch_fq_codel sch_tbf sch_prio sch_htb sch_hfsc sch_ingress sch_sfq xt_CHECKSUM ipt_rpfilter xt_stat istic xt_CT xt_connlimit xt_realm xt_addrtype xt_comment xt_recent xt_nat ipt_REJECT ipt_MASQUERADE ipt_ECN ipt_CLUSTERIP ipt_ah xt_set ip_set ipt_ULOG xt_LOG nf_nat_tftp nf_nat_snmp_basic n f_conntrack_snmp nf_nat_sip nf_nat_pptp nf_nat_proto_gre nf_nat_irc nf_nat_h323 nf_nat_amanda ts_kmp nf_conntrack_amanda nf_conntrack_sane nf_conntrack_tftp nf_conntrack_sip nf_conntrack_pro to_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 xt_TPROXY nf_defrag_ipv6 xt_time xt_TCPMSS xt_tcpmss xt_sctp [ 374.710177] xt_policy xt_pkttype xt_physdev xt_owner xt_NFQUEUE xt_NFLOG nfnetlink_log xt_multiport xt_mark xt_mac xt_limit xt_length xt_iprange xt_helper xt_hashlimit xt_DSCP xt_dscp xt_dccp xt_conntrack xt_connmark xt_CLASSIFY xt_AUDIT xt_state iptable_raw iptable_nat nf_nat_ipv4 nf_conntrack_ipv4 nf_defrag_ipv4 iptable_mangle nfnetlink nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack iptable_filter ip_tables 8021q garp stp mrp llc sg iTCO_wdt iTCO_vendor_support coretemp kvm crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper cryptd serio_raw pcspkr i2c_i801 lpc_ich mfd_core shpchp ipmi_si video ipmi_msghandler acpi_cpufreq mperf ext4 mbcache jbd2 raid1 sd_mod crc_t10dif crct10dif_common mgag200 syscopyarea sysfillrect ahci sysimgblt [ 374.710232] drm_kms_helper libahci ttm libata drm igb e1000e dca i2c_algo_bit i2c_core ptp pps_core dm_mirror dm_region_hash dm_log dm_mod [ 374.710247] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.10.0-123.13.2.el7.x86_64 #1 [ 374.710251] Hardware name: Supermicro X9SCL/X9SCM/X9SCL/X9SCM, BIOS 2.0b 09/17/2012 [ 374.710254] ffff88022fc83d90 a08d8f9572a8441c ffff88022fc83d48 ffffffff815e232c [ 374.710259] ffff88022fc83d80 ffffffff8105dee1 0000000000000000 ffff8802209b4000 [ 374.710264] ffff880220f60e80 0000000000000001 0000000000000001 ffff88022fc83de8 [ 374.710268] Call Trace: [ 374.710271] <IRQ> [<ffffffff815e232c>] dump_stack+0x19/0x1b [ 374.710285] [<ffffffff8105dee1>] warn_slowpath_common+0x61/0x80 [ 374.710291] [<ffffffff8105df5c>] warn_slowpath_fmt+0x5c/0x80 [ 374.710298] [<ffffffff81088681>] ? run_posix_cpu_timers+0x51/0x840 [ 374.710313] [<ffffffff814f0d20>] dev_watchdog+0x270/0x280 [ 374.710318] [<ffffffff814f0ab0>] ? dev_graft_qdisc+0x80/0x80 [ 374.710323] [<ffffffff8106d236>] call_timer_fn+0x36/0x110 [ 374.710328] [<ffffffff814f0ab0>] ? dev_graft_qdisc+0x80/0x80 [ 374.710333] [<ffffffff8106f2ff>] run_timer_softirq+0x21f/0x320 [ 374.710339] [<ffffffff81067047>] __do_softirq+0xf7/0x290 [ 374.710345] [<ffffffff815f435c>] call_softirq+0x1c/0x30 [ 374.710352] [<ffffffff81014cf5>] do_softirq+0x55/0x90 [ 374.710356] [<ffffffff810673e5>] irq_exit+0x115/0x120 [ 374.710361] [<ffffffff815f4d35>] smp_apic_timer_interrupt+0x45/0x60 [ 374.710366] [<ffffffff815f369d>] apic_timer_interrupt+0x6d/0x80 [ 374.710368] <EOI> [<ffffffff814835a2>] ? cpuidle_enter_state+0x52/0xc0 [ 374.710380] [<ffffffff814836d5>] cpuidle_idle_call+0xc5/0x200 [ 374.710386] [<ffffffff8101bc7e>] arch_cpu_idle+0xe/0x30 [ 374.710393] [<ffffffff810b47e5>] cpu_startup_entry+0xf5/0x290 [ 374.710399] [<ffffffff815d028e>] start_secondary+0x1c4/0x1da [ 374.710403] ---[ end trace feb9f00b67f36ca1 ]--- [ 374.710420] e1000e 0000:00:19.0 com: Reset adapter unexpectedly [ 378.560296] e1000e: com NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx And hours later, it repeats (no trace after first time) about 6-11 times per day every day: [12881.408092] e1000e 0000:00:19.0 com: Detected Hardware Unit Hang: TDH <63> TDT <7d> next_to_use <7d> next_to_clean <60> buffer_info[next_to_clean]: time_stamp <100bfef24> next_to_watch <63> jiffies <100c012b9> next_to_watch.status <0> MAC Status <40080083> PHY Status <796d> PHY 1000BASE-T Status <3800> PHY Extended Status <3000> PCI Status <10> [12881.414206] e1000e 0000:00:19.0 com: Reset adapter unexpectedly [12885.520180] e1000e: com NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx I scanned through all the machines here to see if any others use e1000e, and found only one, which has no known issues, but doesn't have as much network traffic. *Here are the details for the only other e1000e machine I have, without problems:* 09:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection Subsystem: Super Micro Computer Inc Device 0000 Kernel driver in use: e1000e Kernel modules: e1000e Linux machine2 3.2.0-55-generic #85-Ubuntu SMP Wed Oct 2 12:29:27 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux Distributor ID: Ubuntu Description: Ubuntu 12.04.4 LTS Release: 12.04 Codename: precise -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
