Hi, all, In 3.8-rc2, access to CIFS-mounted directory (df, ls, or similar) got stuck with following message.
It's mounted with... mount -t cifs //<win_host_ip_address>/Share /mnt/window -o user=jongman.heo,password=xxxx,sec=ntlm [16655.288591] INFO: task bash:4042 blocked for more than 120 seconds. [16655.318117] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [16655.318123] bash D dada9c5c 0 4042 1 0x00000004 [16655.318132] dada9cd0 00000082 00000282 dada9c5c c09022c6 dada9c7c c044d316 c0c7c300 [16655.318139] d6db3a7b 00000f09 c0c7c300 00000000 00000f09 f3b7b240 c04401ba 00000000 [16655.318145] c0b9e0d8 f598e960 00000000 00000303 dada9c98 dada9c98 f598e960 00000006 [16655.318150] Call Trace: [16655.342785] [<c09022c6>] ? _raw_spin_unlock_irqrestore+0xf/0x11 [16655.351554] [<c044d316>] ? __wake_up+0x3b/0x42 [16655.358802] [<c04401ba>] ? call_usermodehelper_fns+0x148/0x152 [16655.358840] [<c0440468>] ? __request_module+0x15e/0x1a1 [16655.358842] [<c043fe3d>] ? call_usermodehelper_freeinfo+0x19/0x19 [16655.358845] [<c0901a9a>] schedule+0x51/0x53 [16655.358847] [<c0901bed>] schedule_preempt_disabled+0x8/0xa [16655.384345] [<c0900de6>] __mutex_lock_common+0xd6/0x123 [16655.384430] [<c0900f39>] __mutex_lock_slowpath+0x20/0x22 [16655.384436] [<c0900edf>] ? mutex_lock+0x18/0x25 [16655.384441] [<c0900edf>] mutex_lock+0x18/0x25 [16655.384892] [<c05e1650>] cifs_reconnect_tcon+0x170/0x252 [16655.384953] [<c044c652>] ? should_resched+0x8/0x22 [16655.384963] [<c09018dc>] ? _cond_resched+0x8/0x1c [16655.384969] [<c05e174f>] smb_init+0x1d/0x6d [16655.385023] [<c05e4f7f>] CIFSSMBQPathInfo+0x4e/0x1e4 [16655.385071] [<c05fe062>] cifs_query_path_info+0x38/0x73 [16655.385080] [<c05f460a>] cifs_get_inode_info+0x122/0x3ac [16655.385548] [<c04e1f2f>] ? walk_component+0x14a/0x17a [16655.385570] [<c05ecf6e>] ? build_path_from_dentry+0xa3/0x19e [16655.385585] [<c05ecf6e>] ? build_path_from_dentry+0xa3/0x19e [16655.385596] [<c05ecf6e>] ? build_path_from_dentry+0xa3/0x19e [16655.385601] [<c04e225c>] ? getname_flags+0x59/0xeb [16655.385606] [<c090227a>] ? _raw_spin_lock+0x8/0xa [16655.385613] [<c05f5c84>] cifs_revalidate_dentry_attr+0x120/0x168 [16655.385618] [<c05f5d6d>] cifs_getattr+0x5e/0xe3 [16655.385625] [<c04dde86>] vfs_getattr+0x37/0x4e [16655.385631] [<c05f5d0f>] ? cifs_revalidate_dentry+0x20/0x20 [16655.385639] [<c04ddef6>] vfs_fstatat+0x59/0x8a [16655.385645] [<c04ddf5b>] vfs_stat+0x19/0x1b [16655.385652] [<c04de160>] sys_stat64+0x11/0x22 [16655.385659] [<c044c652>] ? should_resched+0x8/0x22 [16655.385668] [<c09018dc>] ? _cond_resched+0x8/0x1c [16655.385674] [<c0443b74>] ? task_work_run+0x6d/0x79 [16655.385825] [<c0904f3d>] ? __do_page_fault+0x33b/0x33b [16655.385834] [<c0904f45>] ? do_page_fault+0x8/0xa [16655.385840] [<c0907911>] sysenter_do_call+0x12/0x2c
