我有一个 Ubuntu 14.04 服务器，它偶尔会向 dmesg 日志发出“NOHZ：local_softirq_pending 08”错误。这是在升级到内核 4.4 后开始的；以前它在 3.16 内核上运行没有问题。这是日志末尾的摘录：
[ 7.805258] audit: type=1400 audit(1484883362.092:11): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/sbin/dhclient" pid=1636 comm="apparmor_parser"
[ 10.605443] igb 0000:c1:00.0 eth0: igb: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
[ 10.605545] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 19.219187] ixgbe 0000:02:00.1 p4p2: NIC Link is Up 10 Gbps, Flow Control: None
[ 19.219368] IPv6: ADDRCONF(NETDEV_CHANGE): p4p2: link becomes ready
[ 52.010390] ip_tables: (C) 2000-2006 Netfilter Core Team
[ 52.089283] …