Hi all, This is on a Raspberry Pi 2, but I've seen similar things on other systems. After what I'm assuming is a network interruption, I can't umount the affected CIFS filesystem. lsof hangs too. Linux kiwi.voltagex.org 4.1.15-v7+ #830 SMP Tue Dec 15 17:02:45 GMT 2015 armv7l GNU/Linux Affected mount looks like //icarus/_Recovery on /media/recovery type cifs (rw,relatime,vers=1.0,cache=strict,username=Adam,domain=ICARUS,uid=1000,noforceuid,gid=1000,noforcegid,addr=xxx,file_mode=0755,dir_mode=0755,nounix,serverino,mapposix,rsize=61440,wsize=65536,actimeo=1) root@kiwi:/home/voltagex# modinfo cifs filename: /lib/modules/4.1.15-v7+/kernel/fs/cifs/cifs.ko version: 2.06 description: VFS to access servers complying with the SNIA CIFS Specification e.g. Samba and Windows license: GPL author: Steve French <sfrench@xxxxxxxxxx> alias: fs-cifs srcversion: 39F72BC9A2112B80DA1BF12 depends: intree: Y vermagic: 4.1.15-v7+ SMP mod_unload modversions ARMv7 parm: CIFSMaxBufSize:Network buffer size (not including header). Default: 16384 Range: 8192 to 130048 (uint) parm: cifs_min_rcv:Network buffers in pool. Default: 4 Range: 1 to 64 (uint) parm: cifs_min_small:Small network buffers in pool. Default: 30 Range: 2 to 256 (uint) parm: cifs_max_pending:Simultaneous requests to server. Default: 32767 Range: 2 to 32767. (uint) parm: enable_oplocks:Enable or disable oplocks. Default: y/Y/1 (bool) [341644.662448] INFO: task lsof:7421 blocked for more than 120 seconds. [341644.671778] Not tainted 4.1.15-v7+ #830 [341644.679134] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [341644.692736] lsof D 80553e00 0 7421 1 0x00000001 [341644.702047] [<80553e00>] (__schedule) from [<805542c8>] (schedule+0x4c/0xa4) [341644.712057] [<805542c8>] (schedule) from [<805546a0>] (schedule_preempt_disabled+0x18/0x1c) [341644.726005] [<805546a0>] (schedule_preempt_disabled) from [<80555dc8>] (__mutex_lock_slowpath+0xac/0x168) [341644.741148] [<80555dc8>] (__mutex_lock_slowpath) from [<80555ee8>] (mutex_lock+0x64/0x68) [341644.754944] [<80555ee8>] (mutex_lock) from [<7f0a5b54>] (cifs_reconnect_tcon+0x8c/0x324 [cifs]) [341644.769435] [<7f0a5b54>] (cifs_reconnect_tcon [cifs]) from [<7f0a5e8c>] (smb_init+0x30/0x78 [cifs]) [341644.784330] [<7f0a5e8c>] (smb_init [cifs]) from [<7f0ab1e0>] (CIFSSMBQPathInfo+0x58/0x254 [cifs]) [341644.799182] [<7f0ab1e0>] (CIFSSMBQPathInfo [cifs]) from [<7f0ca334>] (cifs_query_path_info+0x64/0x14c [cifs]) [341644.815112] [<7f0ca334>] (cifs_query_path_info [cifs]) from [<7f0bdbd4>] (cifs_get_inode_info+0x1b8/0x4b4 [cifs]) [341644.831253] [<7f0bdbd4>] (cifs_get_inode_info [cifs]) from [<7f0bf30c>] (cifs_revalidate_dentry_attr+0xd8/0xf0 [cifs]) [341644.847921] [<7f0bf30c>] (cifs_revalidate_dentry_attr [cifs]) from [<7f0bf3e4>] (cifs_getattr+0x60/0x12c [cifs]) [341644.863960] [<7f0bf3e4>] (cifs_getattr [cifs]) from [<801463f0>] (vfs_getattr_nosec+0x3c/0x50) [341644.878414] [<801463f0>] (vfs_getattr_nosec) from [<801464e0>] (vfs_fstatat+0x68/0xa0) [341644.892268] [<801464e0>] (vfs_fstatat) from [<80146544>] (vfs_stat+0x2c/0x30) [341644.902498] [<80146544>] (vfs_stat) from [<80146c84>] (SyS_stat64+0x24/0x40) [341644.912627] [<80146c84>] (SyS_stat64) from [<8000f780>] (ret_fast_syscall+0x0/0x54) I'd really rather not restart the system to fix this, but I can't really see another way. Regards, Adam -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
