今天遇到这个BUG。
现象就是没有任何日志，但是系统一直HANG着尝试使用远控卡RESET了很多次依然不能解决如下：
[root@cqyjfora200 log]# top
top - 22:40:18 up 8 min, 2 users, load average: 0.67, 0.21, 0.06
Tasks: 488 total, 1 running, 487 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.2%us, 0.2%sy, 0.0%ni, 95.3%id, 4.3%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 65932072k total, 901368k used, 65030704k free, 52108k buffers
Swap: 33554424k total, 0k used, 33554424k free, 239292k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3031 root 20 0 15304 1608 976 R 100.0 0.0 30019,26 top
1 root 20 0 19356 1536 1228 S 0.0 0.0 3657894h init
2 root 20 0 0 0 0 S 0.0 0.0 1090706h kthreadd
3 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0
4 root 20 0 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0
5 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0
6 root RT 0 0 0 0 S 0.0 0.0 0:00.00 watchdog/0
7 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/1
8 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/1
9 root 20 0 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/1
10 root RT 0 0 0 0 S 0.0 0.0 600388:40 watchdog/1
11 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/2
12 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/2
13 root 20 0 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/2
14 root RT 0 0 0 0 S 0.0 0.0 600388:40 watchdog/2
15 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/3
16 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/3
17 root 20 0 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/3
18 root RT 0 0 0 0 S 0.0 0.0 600388:40 watchdog/3
19 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/4
20 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/4
21 root 20 0 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/4
22 root RT 0 0 0 0 S 0.0 0.0 600388:40 watchdog/4
23 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/5
24 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/5
25 root 20 0 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/5
26 root RT 0 0 0 0 S 0.0 0.0 600388:40 watchdog/5
27 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/6
28 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/6
29 root 20 0 0 0 0 S 0.0 0.0 20012,57 ksoftirqd/6
30 root RT 0 0 0 0 S 0.0 0.0 0:00.00 watchdog/6
31 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/7
32 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/7
33 root 20 0 0 0 0 S 0.0 0.0 600388:40 ksoftirqd/7
具体参考CENTOS BUG
https://bugs.centos.org/view.php?id=6421
解决办法就是进行一次COLD BOOT
