我的 Ubuntu 12.04 服务器在 syslog/dmesg 中收到以下错误。最近，服务器的网络速度慢了好几倍，导致应用程序挂起，并在其上运行 postgresql-9.1 服务器时出现许多错误。
来自 dmesg 的日志片段
[ 5.923148] tg3 0000:03:00.0: irq 44 for MSI/MSI-X
[ 5.923155] tg3 0000:03:00.0: irq 45 for MSI/MSI-X
[ 5.923160] tg3 0000:03:00.0: irq 46 for MSI/MSI-X
[ 5.923165] tg3 0000:03:00.0: irq 47 for MSI/MSI-X
[ 5.923169] tg3 0000:03:00.0: irq 48 for MSI/MSI-X
[ 6.045713] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 7.716179] tg3 0000:03:00.0 eth0: Link is up at 100 Mbps, full duplex
[ 7.716184] tg3 0000:03:00.0 eth0: Flow control is off for TX and off for RX
[ 7.716185] tg3 0000:03:00.0 eth0: EEE is disabled
[ 7.716268] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
来自 syslog 的日志片段（更多出现）。
Jul 31 18:25:08 sugam kernel: [ 1.848502] tg3 0000:03:00.0 eth0: Tigon3 [partno(N/A) rev 5720000] (PCI Express) MAC address 40:a8:f0:c7:32:a8
Jul 31 18:25:08 sugam kernel: [ 1.848506] tg3 0000:03:00.0 eth0: attached PHY is 5720C (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[1])
Jul 31 18:25:08 sugam kernel: [ 1.848508] tg3 0000:03:00.0 eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[1] TSOcap[1]
Jul 31 18:25:08 sugam kernel: [ 1.848510] tg3 0000:03:00.0 eth0: dma_rwctrl[00000001] dma_mask[64-bit]
Jul 31 18:25:08 sugam kernel: [ 3.684380] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
Jul 31 18:25:08 sugam kernel: [ 5.524600] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
Jul 31 18:25:10 sugam kernel: [ 7.174179] tg3 0000:03:00.0 eth0: Link is up at 100 Mbps, full duplex
Jul 31 18:25:10 sugam kernel: [ 7.174183] tg3 0000:03:00.0 eth0: Flow control is off for TX and off for RX
Jul 31 18:25:10 sugam kernel: [ 7.174184] tg3 0000:03:00.0 eth0: EEE is disabled
Jul 31 18:25:10 sugam kernel: [ 7.174269] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
Jul 31 18:58:24 sugam kernel: [ 1.902218] tg3 0000:03:00.0 eth0: Tigon3 [partno(N/A) rev 5720000] (PCI Express) MAC address 40:a8:f0:c7:32:a8
Jul 31 18:58:24 sugam kernel: [ 1.902222] tg3 0000:03:00.0 eth0: attached PHY is 5720C (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[1])
Jul 31 18:58:24 sugam kernel: [ 1.902224] tg3 0000:03:00.0 eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[1] TSOcap[1]
Jul 31 18:58:24 sugam kernel: [ 1.902226] tg3 0000:03:00.0 eth0: dma_rwctrl[00000001] dma_mask[64-bit]
Jul 31 18:58:24 sugam kernel: [ 3.730192] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
Jul 31 18:58:24 sugam kernel: [ 5.644533] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
Jul 31 18:58:26 sugam kernel: [ 7.234780] tg3 0000:03:00.0 eth0: Link is up at 100 Mbps, full duplex
Jul 31 18:58:26 sugam kernel: [ 7.234784] tg3 0000:03:00.0 eth0: Flow control is off for TX and off for RX
Jul 31 18:58:26 sugam kernel: [ 7.234785] tg3 0000:03:00.0 eth0: EEE is disabled
Jul 31 18:58:26 sugam kernel: [ 7.234865] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
Jul 31 19:07:18 sugam kernel: [ 1.833042] tg3 0000:03:00.0 eth0: Tigon3 [partno(N/A) rev 5720000] (PCI Express) MAC address 40:a8:f0:c7:32:a8
Jul 31 19:07:18 sugam kernel: [ 1.833046] tg3 0000:03:00.0 eth0: attached PHY is 5720C (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[1])
Jul 31 19:07:18 sugam kernel: [ 1.833048] tg3 0000:03:00.0 eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[1] TSOcap[1]
Jul 31 19:07:18 sugam kernel: [ 1.833050] tg3 0000:03:00.0 eth0: dma_rwctrl[00000001] dma_mask[64-bit]
Jul 31 19:07:18 sugam kernel: [ 3.457417] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
Jul 31 19:07:19 sugam kernel: [ 6.045713] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
Jul 31 19:07:20 sugam kernel: [ 7.716179] tg3 0000:03:00.0 eth0: Link is up at 100 Mbps, full duplex
Jul 31 19:07:20 sugam kernel: [ 7.716184] tg3 0000:03:00.0 eth0: Flow control is off for TX and off for RX
Jul 31 19:07:20 sugam kernel: [ 7.716185] tg3 0000:03:00.0 eth0: EEE is disabled
Jul 31 19:07:20 sugam kernel: [ 7.716268] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
我需要弄清楚这台服务器出了什么问题，因此非常感谢您的帮助。