我有一台 CentOS 6.6 服务器 (Linux 2.6.32-504)，运行在全新的 Dell PowerEdge R320 上。就在前几天，我开始注意到与我的一个 NIC 相关的 /var/log/messages 中存在问题。
注意：这是一个服务器集群，需要在交叉网络中使用 eth0 来连接到冗余备份服务器，因此我们使用 eth1 与客户的网络和世界进行通信；所以它会具有挑战性的切换 NIC 以进行故障排除。不过，我还注意到，我没有在 eth0 上看到任何问题。
我想尽可能地排除故障 ~ 是硬件故障，还是 Linux 内核与戴尔硬件不匹配，等等？我不是职业 Linux 管理员，所以在这方面我有点生疏。
谷歌搜索似乎给我带来了更多问题而不是答案（并且似乎只适用于其他发行版；但指出了诸如内核/固件问题等可能性。我谦卑地请求这个社区的专业知识和想法！
我注意到的一件事是，接口速度恢复到了 100Mb/半速（而实际上速度是 1Gb/全速）。
我会尽我所能提供相关信息，希望对您有帮助。
/var/log/messages这是我注意到该问题的片段...这对任何人来说都意味着什么吗？
Mar 22 16:10:07 ind1un043 kernel: ------------[ cut here ]------------
Mar 22 16:10:07 ind1un043 kernel: WARNING: at net/sched/sch_generic.c:261 dev_watchdog+0x26b/0x280() (Not tainted)
Mar 22 16:10:07 ind1un043 kernel: Hardware name: PowerEdge R320
Mar 22 16:10:07 ind1un043 kernel: NETDEV WATCHDOG: eth1 (tg3): transmit queue 0 timed out
Mar 22 16:10:07 ind1un043 kernel: Modules linked in: nls_utf8 hfsplus(U) mpt3sas mpt2sas scsi_transport_sas raid_class mptctl mptbase dell_rbu coretemp 8021q garp stp llc wctc4xxp(U) dahdi_transcode(U) wcb4xxp(U) wctdm(U) wcfxo(U) wctdm24xxp(U) wcte11xp(U) wct1xxp(U) wcte12xp(U) dahdi_voicebus(U) wct4xxp(U) oct612x(U) dahdi(U) crc_ccitt ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4 iptable_filter ip_tables ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables ipv6 uinput iTCO_wdt iTCO_vendor_support microcode dcdbas sb_edac edac_core ipmi_devintf power_meter acpi_ipmi ipmi_si ipmi_msghandler sg shpchp tg3 ptp pps_core lpc_ich mfd_core ext4 jbd2 mbcache sr_mod cdrom sd_mod crc_t10dif ahci wmi megaraid_sas dm_mirror dm_region_hash dm_log dm_mod [last unloaded: speedstep_lib]
Mar 22 16:10:07 ind1un043 kernel: Pid: 9, comm: ksoftirqd/1 Not tainted 2.6.32-504.el6.x86_64 #1
Mar 22 16:10:07 ind1un043 kernel: Call Trace:
Mar 22 16:10:07 ind1un043 kernel: <IRQ> [<ffffffff81074df7>] ? warn_slowpath_common+0x87/0xc0
Mar 22 16:10:07 ind1un043 kernel: [<ffffffff81074ee6>] ? warn_slowpath_fmt+0x46/0x50
Mar 22 16:10:07 ind1un043 kernel: [<ffffffff8147df7b>] ? dev_watchdog+0x26b/0x280
Mar 22 16:10:07 ind1un043 kernel: [<ffffffff81060d7c>] ? scheduler_tick+0xcc/0x260
Mar 22 16:10:07 ind1un043 kernel: [<ffffffff8147dd10>] ? dev_watchdog+0x0/0x280
Mar 22 16:10:07 ind1un043 kernel: [<ffffffff81087db7>] ? run_timer_softirq+0x197/0x340
Mar 22 16:10:07 ind1un043 kernel: [<ffffffff810b0275>] ? tick_dev_program_event+0x65/0xc0
Mar 22 16:10:07 ind1un043 kernel: [<ffffffff8107d8b1>] ? __do_softirq+0xc1/0x1e0
Mar 22 16:10:07 ind1un043 kernel: [<ffffffff810b034a>] ? tick_program_event+0x2a/0x30
Mar 22 16:10:07 ind1un043 kernel: [<ffffffff8100c30c>] ? call_softirq+0x1c/0x30
Mar 22 16:10:07 ind1un043 kernel: [<ffffffff8100fc15>] ? do_softirq+0x65/0xa0
Mar 22 16:10:07 ind1un043 kernel: [<ffffffff8107d765>] ? irq_exit+0x85/0x90
Mar 22 16:10:07 ind1un043 kernel: [<ffffffff81533c0a>] ? smp_apic_timer_interrupt+0x4a/0x60
Mar 22 16:10:07 ind1un043 kernel: [<ffffffff8100bb93>] ? apic_timer_interrupt+0x13/0x20
Mar 22 16:10:07 ind1un043 kernel: <EOI> [<ffffffff8107d4c5>] ? ksoftirqd+0xd5/0x110
Mar 22 16:10:07 ind1un043 kernel: [<ffffffff8107d3f0>] ? ksoftirqd+0x0/0x110
Mar 22 16:10:07 ind1un043 kernel: [<ffffffff8109e66e>] ? kthread+0x9e/0xc0
Mar 22 16:10:07 ind1un043 kernel: [<ffffffff8100c20a>] ? child_rip+0xa/0x20
Mar 22 16:10:07 ind1un043 kernel: [<ffffffff8109e5d0>] ? kthread+0x0/0xc0
Mar 22 16:10:07 ind1un043 kernel: [<ffffffff8100c200>] ? child_rip+0x0/0x20
Mar 22 16:10:07 ind1un043 kernel: ---[ end trace c154004f7af06fb3 ]---
Mar 22 16:10:07 ind1un043 kernel: tg3 0000:02:00.1: eth1: transmit timed out, resetting
Mar 22 16:10:08 ind1un043 kernel: tg3 0000:02:00.1: eth1: 0x00000000: 0x165f14e4, 0x00100406, 0x02000000, 0x00800010
Mar 22 16:10:08 ind1un043 kernel: tg3 0000:02:00.1: eth1: 0x00000010: 0xd90d000c, 0x00000000, 0xd90e000c, 0x00000000
Mar 22 16:10:08 ind1un043 kernel: tg3 0000:02:00.1: eth1: 0x00000020: 0xd90f000c, 0x00000000, 0x00000000, 0x04f71028
... (TOO MANY CHARACTERS TO POST ON SERVER FAULT, SO STRIPPING) ...
Mar 22 16:10:09 ind1un043 kernel: tg3 0000:02:00.1: eth1: 0x00007020: 0x00000000, 0x00000000, 0x00000406, 0x10004000
Mar 22 16:10:09 ind1un043 kernel: tg3 0000:02:00.1: eth1: 0x00007030: 0x000e0000, 0x00004af8, 0x00170030, 0x00000000
Mar 22 16:10:09 ind1un043 kernel: tg3 0000:02:00.1: eth1: 0: Host status block [00000001:00000063:(0000:0695:0000):(0000:01b8)]
Mar 22 16:10:09 ind1un043 kernel: tg3 0000:02:00.1: eth1: 0: NAPI info [00000063:00000063:(01a5:01b8:01ff):0000:(0095:0000:0000:0000)]
Mar 22 16:10:09 ind1un043 kernel: tg3 0000:02:00.1: eth1: 1: Host status block [00000001:000000ac:(0000:0000:0000):(083a:0000)]
Mar 22 16:10:09 ind1un043 kernel: tg3 0000:02:00.1: eth1: 1: NAPI info [000000ac:000000ac:(0000:0000:01ff):083a:(003a:003a:0000:0000)]
Mar 22 16:10:09 ind1un043 kernel: tg3 0000:02:00.1: eth1: 2: Host status block [00000001:0000004f:(089e:0000:0000):(0000:0000)]
Mar 22 16:10:09 ind1un043 kernel: tg3 0000:02:00.1: eth1: 2: NAPI info [00000046:00000046:(0000:0000:01ff):0895:(0095:0095:0000:0000)]
Mar 22 16:10:09 ind1un043 kernel: tg3 0000:02:00.1: eth1: 3: Host status block [00000001:00000012:(0000:0000:0000):(0000:0000)]
Mar 22 16:10:09 ind1un043 kernel: tg3 0000:02:00.1: eth1: 3: NAPI info [00000012:00000012:(0000:0000:01ff):0fbc:(07bc:07bc:0000:0000)]
Mar 22 16:10:09 ind1un043 kernel: tg3 0000:02:00.1: eth1: 4: Host status block [00000001:000000d4:(0000:0000:0742):(0000:0000)]
Mar 22 16:10:09 ind1un043 kernel: tg3 0000:02:00.1: eth1: 4: NAPI info [000000d4:000000d4:(0000:0000:01ff):0742:(0742:0742:0000:0000)]
Mar 22 16:10:09 ind1un043 kernel: tg3 0000:02:00.1: tg3_stop_block timed out, ofs=1400 enable_bit=2
Mar 22 16:10:09 ind1un043 kernel: tg3 0000:02:00.1: tg3_stop_block timed out, ofs=c00 enable_bit=2
Mar 22 16:10:09 ind1un043 kernel: tg3 0000:02:00.1: eth1: Link is down
Mar 22 16:10:11 ind1un043 kernel: tg3 0000:02:00.1: eth1: Link is up at 100 Mbps, half duplex
Mar 22 16:10:11 ind1un043 kernel: tg3 0000:02:00.1: eth1: Flow control is off for TX and off for RX
Mar 22 16:10:11 ind1un043 kernel: tg3 0000:02:00.1: eth1: EEE is disabled
/var/log/messages但在此之前，这里是NIC 在启动过程中看似正常初始化的片段……
Mar 21 16:01:13 ind1un043 kernel: tg3 0000:02:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
Mar 21 16:01:13 ind1un043 kernel: tg3 0000:02:00.0: eth0: Tigon3 [partno(BCM95720) rev 5720000] (PCI Express) MAC address 14:18:77:32:77:3f
Mar 21 16:01:13 ind1un043 kernel: tg3 0000:02:00.0: eth0: attached PHY is 5720C (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[1])
Mar 21 16:01:13 ind1un043 kernel: tg3 0000:02:00.0: eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[1] TSOcap[1]
Mar 21 16:01:13 ind1un043 kernel: tg3 0000:02:00.0: eth0: dma_rwctrl[00000001] dma_mask[64-bit]
Mar 21 16:01:13 ind1un043 kernel: tg3 0000:02:00.1: PCI INT B -> GSI 17 (level, low) -> IRQ 17
Mar 21 16:01:13 ind1un043 kernel: tg3 0000:02:00.1: eth1: Tigon3 [partno(BCM95720) rev 5720000] (PCI Express) MAC address 14:18:77:32:77:40
Mar 21 16:01:13 ind1un043 kernel: tg3 0000:02:00.1: eth1: attached PHY is 5720C (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[1])
Mar 21 16:01:13 ind1un043 kernel: tg3 0000:02:00.1: eth1: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[1] TSOcap[1]
Mar 21 16:01:13 ind1un043 kernel: tg3 0000:02:00.1: eth1: dma_rwctrl[00000001] dma_mask[64-bit]
下面是 NIC 看似正常出现的片段/var/log/messages，但不确定是在什么情况下出现的（它就在该片段上方的 init 之后）...
Mar 21 16:01:13 ind1un043 kernel: ADDRCONF(NETDEV_UP): eth0: link is not ready
Mar 21 16:01:13 ind1un043 kernel: ADDRCONF(NETDEV_UP): eth1: link is not ready
Mar 21 16:01:13 ind1un043 kernel: tg3 0000:02:00.0: eth0: Link is up at 1000 Mbps, full duplex
Mar 21 16:01:13 ind1un043 kernel: tg3 0000:02:00.0: eth0: Flow control is on for TX and on for RX
Mar 21 16:01:13 ind1un043 kernel: tg3 0000:02:00.0: eth0: EEE is disabled
Mar 21 16:01:13 ind1un043 kernel: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
Mar 21 16:01:13 ind1un043 kernel: tg3 0000:02:00.1: eth1: Link is up at 100 Mbps, half duplex
Mar 21 16:01:13 ind1un043 kernel: tg3 0000:02:00.1: eth1: Flow control is off for TX and off for RX
Mar 21 16:01:13 ind1un043 kernel: tg3 0000:02:00.1: eth1: EEE is disabled
Mar 21 16:01:13 ind1un043 kernel: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
以下是 NIC 似乎很快又出现其他问题（重新协商或类似情况）的片段/var/log/messages。这种情况在接下来的几天内随机发生多次……
Mar 21 16:01:42 ind1un043 kernel: ADDRCONF(NETDEV_UP): eth1: link is not ready
Mar 21 16:01:44 ind1un043 kernel: tg3 0000:02:00.1: eth1: Link is up at 100 Mbps, half duplex
Mar 21 16:01:44 ind1un043 kernel: tg3 0000:02:00.1: eth1: Flow control is off for TX and off for RX
Mar 21 16:01:44 ind1un043 kernel: tg3 0000:02:00.1: eth1: EEE is disabled
Mar 21 16:01:44 ind1un043 kernel: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
这是我的lspci | grep -i net...
02:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe
02:00.1 Ethernet controller: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe
答案1
不确定这是否是一个“答案”，但就这个特定情况而言，它确实解决了我的问题。这似乎与 ACPI 有关。
我编辑了我的/etc/grub.conf文件，将以下内容添加到行尾kernel：
noapic acpi=off pci=noacpi
我现在不再在日志中看到任何错误。
是不是因为省电功能关闭了接口，然后以较慢的模式将其恢复？还是硬件/固件和内核存在一些错误？不确定 ~ 但这至少解决了我的问题（这是一台生产服务器，我们永远不希望它的网络瘫痪）。