Issue

• Getting errors when executing 'ls' or other commands on the system.
• Several processes are getting into D state, thus raising the load average.
• System crashed with the following call trace:

kernel: igb 0000:06:00.1: Detected Tx Unit Hang
kernel:  Tx Queue             <3>
kernel:  TDH                  <ee>  
kernel:  TDT                  <ee>  
kernel:  next_to_use          <ee>  
kernel:  next_to_clean        <b3>  
kernel: buffer_info[next_to_clean] 
kernel: view: server view not responding, timed out
....
Call Trace:
 [<ffffffffa05f24c2>] ? nfs_permission+0xb2/0x1e0 [nfs]
 [<ffffffff8150f1ee>] __mutex_lock_slowpath+0x13e/0x180
 [<ffffffff8150f08b>] mutex_lock+0x2b/0x50
 [<ffffffff81192b23>] do_filp_open+0x2e3/0xdd0
 [<ffffffffa06cf9a7>] ? mvfs_mythread+0x8e/0x7ea [mvfs]
 [<ffffffffa06e2456>] ? mvfs_dncadd_subr+0x120f/0x171e [mvfs]
 [<ffffffffa0701f8d>] ? vnlayer_fsuid_save+0x5e/0x15d [mvfs]
 [<ffffffff8119362d>] filp_open+0x1d/0x20
 [<ffffffffa06fdb57>] mdki_linux_createvp+0x6d/0xda [mvfs]        
 [<ffffffffa06cac8e>] mfs_clear_create+0x1c2/0x496 [mvfs]          
 [<ffffffffa06e7c19>] ? mfs_clnt_create+0x579/0x58b [mvfs]
 [<ffffffffa06c8d4b>] mvfs_create_subr_with_cvp+0x4c4/0x752 [mvfs] 
 [<ffffffffa06c900d>] mvfs_create_subr_ctx+0x34/0x36 [mvfs]  
 [<ffffffffa06fc1cb>] vnode_iop_create+0xc0/0x13d [mvfs]       
 [<ffffffffa06fb715>] ? vnode_iop_permission+0x4d/0x5d [mvfs]
 [<ffffffff8118f8a4>] vfs_create+0xb4/0xe0
 [<ffffffff811933fb>] do_filp_open+0xbbb/0xdd0
 [<ffffffff8104757c>] ? __do_page_fault+0x1ec/0x480
 [<ffffffff810e6dd5>] ? call_rcu_sched+0x15/0x20
 [<ffffffff8119f5e2>] ? alloc_fd+0x92/0x160
 [<ffffffff8117df59>] do_sys_open+0x69/0x140
 [<ffffffff811d27aa>] compat_sys_open+0x1a/0x20
 [<ffffffff8104d810>] sysenter_dispatch+0x7/0x2e