系统崩溃，带有错误信息 'INFO: task oracle:1230 blocked for more than 120 seconds'

Issue

• 在 VMware 环境中配置的虚拟客户端会造成在控制台中出现以下错误信息：

INFO: task oracle:1230 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
oracle        D 000000000000000f     0 1230      1 0x00000080
 ffff8804f1acbac8 0000000000000082 0000000000000000 ffffffff8108107d
 ffffea0019ccabf8 000000002e76a93d ffff880839c40938 ffff880839c40848
 ffff8805df8a1058 ffff8804f1acbfd8 000000000000fb88 ffff8805df8a1058
Call Trace:
 [<ffffffff8108107d>] ? del_timer+0x7d/0xe0
 [<ffffffff8150e3a3>] io_schedule+0x73/0xc0
 [<ffffffff811beabe>] __blockdev_direct_IO_newtrunc+0x6de/0xb30
 [<ffffffff811bef6e>] __blockdev_direct_IO+0x5e/0xd0
 [<ffffffff811bb340>] ? blkdev_get_blocks+0x0/0xc0
 [<ffffffff811bc407>] blkdev_direct_IO+0x57/0x60
 [<ffffffff811bb340>] ? blkdev_get_blocks+0x0/0xc0
 [<ffffffff8111bbbb>] generic_file_aio_read+0x6bb/0x700
 [<ffffffff8100bb8e>] ? apic_timer_interrupt+0xe/0x20
 [<ffffffff81180e20>] ? do_sync_read+0x0/0x140
 [<ffffffff811bb953>] blkdev_aio_read+0x53/0xc0
 [<ffffffff811bb900>] ? blkdev_aio_read+0x0/0xc0
 [<ffffffff81180f1a>] do_sync_read+0xfa/0x140
 [<ffffffff8105af54>] ? thread_group_times+0x44/0xb0
 [<ffffffff81096ca0>] ? autoremove_wake_function+0x0/0x40
 [<ffffffff8106b3be>] ? mmput+0x1e/0x120
 [<ffffffff8121bc86>] ? security_file_permission+0x16/0x20
 [<ffffffff81181805>] vfs_read+0xb5/0x1a0
 [<ffffffff81181b32>] sys_pread64+0x82/0xa0
 [<ffffffff8100b072>] system_call_fastpath+0x16/0x1b
Kernel panic - not syncing: hung_task: blocked tasks
Pid: 177, comm: khungtaskd Tainted: G        W  ---------------    2.6.32-358.11.1.el6.x86_64 #1