JBD2 有 Fork 炸弹？Kill -9 不起作用（Ubuntu 12.04）

Question

此进程以每秒 10MB 的速度写入我的磁盘，我无法终止它。我认为它是 Ubuntu 12.04 中的一个 bug/fork 炸弹。

看：

root@beb:~# ps -efaww|grep jbd2
root       355     2  0 Jun23 ?        00:31:13 [jbd2/sda5-8]
root      1458     2  0 Jun23 ?        00:00:13 [jbd2/sda6-8]
root      8963     2  0 Jun23 ?        00:00:02 [jbd2/dm-3-8]
root     23457 23053  0 10:13 pts/13   00:00:00 grep --color=auto jbd2
root@beb:~# kill -9 355 1458 8963
root@beb:~# ps -efaww|grep jbd2
root       355     2  0 Jun23 ?        00:31:13 [jbd2/sda5-8]
root      1458     2  0 Jun23 ?        00:00:13 [jbd2/sda6-8]
root      8963     2  0 Jun23 ?        00:00:02 [jbd2/dm-3-8]
root     23457 23054  0 10:13 pts/13   00:00:00 grep --color=auto jbd2

root@beb:/proc# lsof|grep jb
lsof: WARNING: can't stat() fuse.gvfs-fuse-daemon file system /home/lmadmin/.gvfs
  Output information may be incomplete.
jbd2/sda5   355       root  cwd       DIR                8,5         4096          2 /
jbd2/sda5   355       root  rtd       DIR                8,5         4096          2 /
jbd2/sda5   355       root  txt   unknown                                                /proc/355/exe
jbd2/sda6  1458       root  cwd       DIR                8,5         4096          2 /
jbd2/sda6  1458       root  rtd       DIR                8,5         4096          2 /
jbd2/sda6  1458       root  txt   unknown                                                /proc/1458/exe


$sudo iotop
Total DISK READ:       0.00 B/s | Total DISK WRITE:    1966.97 K/s
TID  PRIO  USER     DISK READ  DISK WRITE  SWAPIN     IO>    COMMAND                 
355 be/3 root        0.00 B/s   22.96 MB/s  0.00 % 93.93 % [jbd2/sda5-8]

我该如何停止 jbd2？非常感谢