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 ///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] [] ? _raw_spin_unlock_irqrestore+0xf/0x11 [16655.351554] [] ? __wake_up+0x3b/0x42 [16655.358802] [] ? call_usermodehelper_fns+0x148/0x152 [16655.358840] [] ? __request_module+0x15e/0x1a1 [16655.358842] [] ? call_usermodehelper_freeinfo+0x19/0x19 [16655.358845] [] schedule+0x51/0x53 [16655.358847] [] schedule_preempt_disabled+0x8/0xa [16655.384345] [] __mutex_lock_common+0xd6/0x123 [16655.384430] [] __mutex_lock_slowpath+0x20/0x22 [16655.384436] [] ? mutex_lock+0x18/0x25 [16655.384441] [] mutex_lock+0x18/0x25 [16655.384892] [] cifs_reconnect_tcon+0x170/0x252 [16655.384953] [] ? should_resched+0x8/0x22 [16655.384963] [] ? _cond_resched+0x8/0x1c [16655.384969] [] smb_init+0x1d/0x6d [16655.385023] [] CIFSSMBQPathInfo+0x4e/0x1e4 [16655.385071] [] cifs_query_path_info+0x38/0x73 [16655.385080] [] cifs_get_inode_info+0x122/0x3ac [16655.385548] [] ? walk_component+0x14a/0x17a [16655.385570] [] ? build_path_from_dentry+0xa3/0x19e [16655.385585] [] ? build_path_from_dentry+0xa3/0x19e [16655.385596] [] ? build_path_from_dentry+0xa3/0x19e [16655.385601] [] ? getname_flags+0x59/0xeb [16655.385606] [] ? _raw_spin_lock+0x8/0xa [16655.385613] [] cifs_revalidate_dentry_attr+0x120/0x168 [16655.385618] [] cifs_getattr+0x5e/0xe3 [16655.385625] [] vfs_getattr+0x37/0x4e [16655.385631] [] ? cifs_revalidate_dentry+0x20/0x20 [16655.385639] [] vfs_fstatat+0x59/0x8a [16655.385645] [] vfs_stat+0x19/0x1b [16655.385652] [] sys_stat64+0x11/0x22 [16655.385659] [] ? should_resched+0x8/0x22 [16655.385668] [] ? _cond_resched+0x8/0x1c [16655.385674] [] ? task_work_run+0x6d/0x79 [16655.385825] [] ? __do_page_fault+0x33b/0x33b [16655.385834] [] ? do_page_fault+0x8/0xa [16655.385840] [] sysenter_do_call+0x12/0x2c {.n++%ݶw{.n+{G{ayʇڙ,jfhz_(階ݢj"mG?&~iOzv^m ?I