Server hangs due to third party fujitsu module "sfdsk*"

Issue

• The system hangs with high load and blocked tasks stuck in the sfdsk_thread_entry() function of the third-party kernel module [sfdsk*]

Oct  4 01:05:56 local.example.com kernel: INFO: task sdxsys_copyd_en:22081 blocked for more than 120 seconds.
Oct  4 01:05:56 local.example.com kernel:      Tainted: P           -- ------------    2.6.32-754.el6.x86_64 #1
Oct  4 01:05:56 local.example.com kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Oct  4 01:05:56 local.example.com kernel: sdxsys_copyd_ D 0000000000000019     0 22081      2 0x00000000
Oct  4 01:05:56 local.example.com kernel: ffff88184c60fe50 0000000000000046 0000000000000000 0000000000000286
Oct  4 01:05:56 local.example.com kernel: ffff881861a06150 0000000000000086 0000001b84f892c0 ffff88010c955e40
Oct  4 01:05:56 local.example.com kernel: 00000000fffd39a4 0000000000000000 ffff88185e693068 ffff88184c60ffd8
Oct  4 01:05:56 local.example.com kernel: Call Trace:
Oct  4 01:05:56 local.example.com kernel: [<ffffffff810fbf15>] ? call_rcu_sched+0x15/0x20
Oct  4 01:05:56 local.example.com kernel: [<ffffffffa067aec0>] cv_wait+0x70/0xd0 [sfdsksys]
Oct  4 01:05:56 local.example.com kernel: [<ffffffff8106f050>] ? default_wake_function+0x0/0x20
Oct  4 01:05:56 local.example.com kernel: [<ffffffffa068c730>] ? sfdsk_copyd_entry+0x0/0x1d0 [sfdsksys]
Oct  4 01:05:56 local.example.com kernel: [<ffffffffa0679675>] sfdsk_thread_wait+0x25/0x30 [sfdsksys]
Oct  4 01:05:56 local.example.com kernel: [<ffffffffa068c782>] sfdsk_copyd_entry+0x52/0x1d0 [sfdsksys]
Oct  4 01:05:56 local.example.com kernel: [<ffffffffa068c730>] ? sfdsk_copyd_entry+0x0/0x1d0 [sfdsksys]
Oct  4 01:05:56 local.example.com kernel: [<ffffffffa06799fd>] sfdsk_thread_entry+0x5d/0xa0 [sfdsksys]
Oct  4 01:05:56 local.example.com kernel: [<ffffffffa06799a0>] ? sfdsk_thread_entry+0x0/0xa0 [sfdsksys]
Oct  4 01:05:56 local.example.com kernel: [<ffffffff8156085a>] child_rip+0xa/0x30
Oct  4 01:05:56 local.example.com kernel: [<ffffffffa06799a0>] ? sfdsk_thread_entry+0x0/0xa0 [sfdsksys]
Oct  4 01:05:56 local.example.com kernel: [<ffffffffa06799a0>] ? sfdsk_thread_entry+0x0/0xa0 [sfdsksys]
Oct  4 01:05:56 local.example.com kernel: [<ffffffff81560850>] ? child_rip+0x0/0x30