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Date: Thu, 16 Aug 2012 16:56:15 +0300 From: Marti Raudsepp <marti@...fo.org> To: Kernel hackers <linux-kernel@...r.kernel.org>, CIFS hackers <linux-cifs@...r.kernel.org> Subject: CIFS on 3.5.0 causes hung tasks; Unexpected lookup error -19 Hi list, I have a few mount points to Microsoft Windows 2000 SP4 and a simple process that repeatedly opens files by name, reads the first 256 bytes and then closes it. Yesterday I was testing some unrelated applications in face of network problems and I used tc/netem/mirred/ifb to cause 50% packet loss on the receiving side. Shortly after setting it up, CIFS started reporting various errors from the mount point, though I was not aware of that. Today, I was updating my system using pacman and it hung because it does statvfs on every file system to find the amount of free space. Any file system access to /mnt/direc01 now freezes the process. Even sending a SIGKILL does not make it a defunct/zombie process. Surprisingly, another CIFS mount point (which I have unmounted by now) was not affected and was still functioning. I'm using Arch Linux x86_64, Linux 3.5.0, cifs-utils 5.6. There are two CIFS mounts on the same mount point due to operator accident. They were manually mounted using mount.cifs. Mount info: # mount |grep cifs //192.168.xx.xx/e$/recorder.0020 on /mnt/direc01 type cifs (ro,relatime,vers=1.0,sec=ntlm,cache=loose,unc=\\192.168.xx.xx\e$,username=xxxxxxxx,uid=0,noforceuid,gid=0,noforcegid,addr=192.168.xx.xx,file_mode=0755,dir_mode=0755,nounix,serverino,rsize=61440,wsize=65536,actimeo=1) //192.168.xx.xx/e$/recorder.0020 on /mnt/direc01 type cifs (ro,relatime,vers=1.0,sec=ntlm,cache=strict,unc=\\192.168.xx.xx\e$,username=xxxxxxxx,uid=0,noforceuid,gid=0,noforcegid,addr=192.168.xx.xx,file_mode=0755,dir_mode=0755,nounix,rsize=61440,wsize=65536,actimeo=1) # umount -f /mnt/direc01 umount: /mnt/direc01: target is busy. Info about the hung task: # cat /proc/28959/wchan cifs_reconnect_tcon # cat /proc/28959/status Name: pacman State: D (disk sleep) Tgid: 28959 Pid: 28959 PPid: 28958 TracerPid: 29611 Uid: 0 0 0 0 Gid: 0 0 0 0 FDSize: 64 Groups: 0 1 2 3 4 6 10 19 VmPeak: 187888 kB VmSize: 157188 kB VmLck: 0 kB VmPin: 0 kB VmHWM: 32088 kB VmRSS: 30392 kB VmData: 102648 kB VmStk: 136 kB VmExe: 96 kB VmLib: 6376 kB VmPTE: 196 kB VmSwap: 40 kB Threads: 1 SigQ: 7/30088 SigPnd: 0000000000040100 ShdPnd: 0000000000000100 SigBlk: 0000000000000000 SigIgn: 0000000000001000 SigCgt: 0000000180004403 CapInh: 0000000000000000 CapPrm: ffffffffffffffff CapEff: ffffffffffffffff CapBnd: ffffffffffffffff Cpus_allowed: 3f Cpus_allowed_list: 0-5 Mems_allowed: 00000000,00000001 Mems_allowed_list: 0 voluntary_ctxt_switches: 68890 nonvoluntary_ctxt_switches: 1601 This is how I set up my netem (eth1 is the actual network interface): modprobe ifb modprobe act_mirred ip link set dev ifb0 up tc qdisc add dev eth1 ingress tc filter add dev eth1 parent ffff: protocol ip u32 match u32 0 0 flowid 1:1 action mirred egress redirect dev ifb0 tc qdisc add dev ifb0 root netem loss 50% Relevant dmesg: [1407727.963832] Mirror/redirect action on [1407745.870295] netem: version 1.3 [1407830.398552] u32 classifier [1407830.398555] input device check on [1407830.398556] Actions configured [1407908.403807] CIFS VFS: Send error in read = -11 [1407974.046542] CIFS VFS: Send error in read = -11 [1408088.564354] CIFS VFS: Send error in read = -11 [1408217.057189] CIFS VFS: Send error in read = -11 [1408249.777488] CIFS VFS: Server 192.168.xx.xx has not responded in 120 seconds. Reconnecting... [1408348.797783] CIFS VFS: Send error in read = -11 [1408508.941496] CIFS VFS: Send error in read = -11 [1408633.414822] CIFS VFS: Send error in read = -11 [1408730.842848] CIFS VFS: Send error in read = -11 [1408869.264888] CIFS VFS: Send error in read = -11 [1408965.201995] CIFS VFS: Send error in read = -11 [1409117.178193] CIFS VFS: Server 192.168.xx.xx has not responded in 120 seconds. Reconnecting... [1409117.178240] CIFS VFS: Send error in read = -11 [1409296.989095] CIFS VFS: Send error in read = -11 [1409424.869743] CIFS VFS: Send error in read = -11 [1409600.976700] CIFS VFS: Server 192.168.xx.xx has not responded in 120 seconds. Reconnecting... [1409600.976739] CIFS VFS: Send error in read = -11 [1483702.836664] INFO: task pacman:28959 blocked for more than 120 seconds. [1483702.836668] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [1483702.836670] pacman D 0000000000000246 0 28959 28958 0x00000000 [1483702.836673] ffff8800215b9c18 0000000000000082 ffff8800cbc258b0 ffff8800215b9fd8 [1483702.836676] ffff8800215b9fd8 ffff8800215b9fd8 ffff880009fbb060 ffff8800cbc258b0 [1483702.836678] ffff8800215b9dc8 ffff8800215b9dc8 ffff88010ff610d0 ffff88010ff610d0 [1483702.836681] Call Trace: [1483702.836689] [<ffffffff81183164>] ? lookup_fast+0x44/0x310 [1483702.836693] [<ffffffff8120304c>] ? security_inode_permission+0x1c/0x30 [1483702.836696] [<ffffffff81479569>] schedule+0x29/0x70 [1483702.836698] [<ffffffff81479837>] schedule_preempt_disabled+0x27/0x40 [1483702.836701] [<ffffffff81477ec8>] __mutex_lock_slowpath+0x148/0x340 [1483702.836706] [<ffffffff814780d6>] mutex_lock+0x16/0x30 [1483702.836712] [<ffffffffa03b0686>] cifs_reconnect_tcon+0x196/0x320 [cifs] [1483702.836717] [<ffffffffa03b08e9>] smb_init+0x39/0x70 [cifs] [1483702.836720] [<ffffffffa03b8814>] CIFSSMBQFSInfo+0x64/0x210 [cifs] [1483702.836723] [<ffffffffa03af47e>] cifs_statfs+0xce/0x160 [cifs] [1483702.836726] [<ffffffff811a6c61>] statfs_by_dentry+0xa1/0x140 [1483702.836727] [<ffffffff811a6d1b>] vfs_statfs+0x1b/0xb0 [1483702.836729] [<ffffffff811a6de7>] user_statfs+0x37/0x50 [1483702.836731] [<ffffffff811a6e80>] sys_statfs+0x20/0x40 [1483702.836734] [<ffffffff81481929>] system_call_fastpath+0x16/0x1b [1483822.625146] INFO: task pacman:28959 blocked for more than 120 seconds. [1483822.625151] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [1483822.625152] pacman D 0000000000000246 0 28959 28958 0x00000000 [1483822.625156] ffff8800215b9c18 0000000000000082 ffff8800cbc258b0 ffff8800215b9fd8 [1483822.625159] ffff8800215b9fd8 ffff8800215b9fd8 ffff880009fbb060 ffff8800cbc258b0 [1483822.625161] ffff8800215b9dc8 ffff8800215b9dc8 ffff88010ff610d0 ffff88010ff610d0 [1483822.625163] Call Trace: [1483822.625171] [<ffffffff81183164>] ? lookup_fast+0x44/0x310 [1483822.625175] [<ffffffff8120304c>] ? security_inode_permission+0x1c/0x30 [1483822.625178] [<ffffffff81479569>] schedule+0x29/0x70 [1483822.625181] [<ffffffff81479837>] schedule_preempt_disabled+0x27/0x40 [1483822.625183] [<ffffffff81477ec8>] __mutex_lock_slowpath+0x148/0x340 [1483822.625188] [<ffffffff814780d6>] mutex_lock+0x16/0x30 [1483822.625193] [<ffffffffa03b0686>] cifs_reconnect_tcon+0x196/0x320 [cifs] [1483822.625199] [<ffffffffa03b08e9>] smb_init+0x39/0x70 [cifs] [1483822.625203] [<ffffffffa03b8814>] CIFSSMBQFSInfo+0x64/0x210 [cifs] [1483822.625206] [<ffffffffa03af47e>] cifs_statfs+0xce/0x160 [cifs] [1483822.625208] [<ffffffff811a6c61>] statfs_by_dentry+0xa1/0x140 [1483822.625210] [<ffffffff811a6d1b>] vfs_statfs+0x1b/0xb0 [1483822.625212] [<ffffffff811a6de7>] user_statfs+0x37/0x50 [1483822.625213] [<ffffffff811a6e80>] sys_statfs+0x20/0x40 [1483822.625216] [<ffffffff81481929>] system_call_fastpath+0x16/0x1b [1483942.413619] INFO: task pacman:28959 blocked for more than 120 seconds. [1483942.413623] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [1483942.413624] pacman D 0000000000000246 0 28959 28958 0x00000000 [1483942.413628] ffff8800215b9c18 0000000000000082 ffff8800cbc258b0 ffff8800215b9fd8 [1483942.413631] ffff8800215b9fd8 ffff8800215b9fd8 ffff880009fbb060 ffff8800cbc258b0 [1483942.413633] ffff8800215b9dc8 ffff8800215b9dc8 ffff88010ff610d0 ffff88010ff610d0 [1483942.413636] Call Trace: [1483942.413643] [<ffffffff81183164>] ? lookup_fast+0x44/0x310 [1483942.413647] [<ffffffff8120304c>] ? security_inode_permission+0x1c/0x30 [1483942.413650] [<ffffffff81479569>] schedule+0x29/0x70 [1483942.413652] [<ffffffff81479837>] schedule_preempt_disabled+0x27/0x40 [1483942.413655] [<ffffffff81477ec8>] __mutex_lock_slowpath+0x148/0x340 [1483942.413659] [<ffffffff814780d6>] mutex_lock+0x16/0x30 [1483942.413665] [<ffffffffa03b0686>] cifs_reconnect_tcon+0x196/0x320 [cifs] [1483942.413671] [<ffffffffa03b08e9>] smb_init+0x39/0x70 [cifs] [1483942.413674] [<ffffffffa03b8814>] CIFSSMBQFSInfo+0x64/0x210 [cifs] [1483942.413677] [<ffffffffa03af47e>] cifs_statfs+0xce/0x160 [cifs] [1483942.413680] [<ffffffff811a6c61>] statfs_by_dentry+0xa1/0x140 [1483942.413682] [<ffffffff811a6d1b>] vfs_statfs+0x1b/0xb0 [1483942.413683] [<ffffffff811a6de7>] user_statfs+0x37/0x50 [1483942.413685] [<ffffffff811a6e80>] sys_statfs+0x20/0x40 [1483942.413688] [<ffffffff81481929>] system_call_fastpath+0x16/0x1b [1484062.202109] INFO: task pacman:28959 blocked for more than 120 seconds. [1484062.202113] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [1484062.202115] pacman D 0000000000000246 0 28959 28958 0x00000000 [1484062.202119] ffff8800215b9c18 0000000000000082 ffff8800cbc258b0 ffff8800215b9fd8 [1484062.202122] ffff8800215b9fd8 ffff8800215b9fd8 ffff880009fbb060 ffff8800cbc258b0 [1484062.202124] ffff8800215b9dc8 ffff8800215b9dc8 ffff88010ff610d0 ffff88010ff610d0 [1484062.202126] Call Trace: [1484062.202133] [<ffffffff81183164>] ? lookup_fast+0x44/0x310 [1484062.202137] [<ffffffff8120304c>] ? security_inode_permission+0x1c/0x30 [1484062.202141] [<ffffffff81479569>] schedule+0x29/0x70 [1484062.202143] [<ffffffff81479837>] schedule_preempt_disabled+0x27/0x40 [1484062.202146] [<ffffffff81477ec8>] __mutex_lock_slowpath+0x148/0x340 [1484062.202150] [<ffffffff814780d6>] mutex_lock+0x16/0x30 [1484062.202156] [<ffffffffa03b0686>] cifs_reconnect_tcon+0x196/0x320 [cifs] [1484062.202161] [<ffffffffa03b08e9>] smb_init+0x39/0x70 [cifs] [1484062.202165] [<ffffffffa03b8814>] CIFSSMBQFSInfo+0x64/0x210 [cifs] [1484062.202168] [<ffffffffa03af47e>] cifs_statfs+0xce/0x160 [cifs] [1484062.202170] [<ffffffff811a6c61>] statfs_by_dentry+0xa1/0x140 [1484062.202172] [<ffffffff811a6d1b>] vfs_statfs+0x1b/0xb0 [1484062.202173] [<ffffffff811a6de7>] user_statfs+0x37/0x50 [1484062.202175] [<ffffffff811a6e80>] sys_statfs+0x20/0x40 [1484062.202178] [<ffffffff81481929>] system_call_fastpath+0x16/0x1b [1484181.990599] INFO: task pacman:28959 blocked for more than 120 seconds. [1484181.990603] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [1484181.990605] pacman D 0000000000000246 0 28959 28958 0x00000000 [1484181.990609] ffff8800215b9c18 0000000000000082 ffff8800cbc258b0 ffff8800215b9fd8 [1484181.990612] ffff8800215b9fd8 ffff8800215b9fd8 ffff880009fbb060 ffff8800cbc258b0 [1484181.990614] ffff8800215b9dc8 ffff8800215b9dc8 ffff88010ff610d0 ffff88010ff610d0 [1484181.990617] Call Trace: [1484181.990624] [<ffffffff81183164>] ? lookup_fast+0x44/0x310 [1484181.990627] [<ffffffff8120304c>] ? security_inode_permission+0x1c/0x30 [1484181.990631] [<ffffffff81479569>] schedule+0x29/0x70 [1484181.990633] [<ffffffff81479837>] schedule_preempt_disabled+0x27/0x40 [1484181.990635] [<ffffffff81477ec8>] __mutex_lock_slowpath+0x148/0x340 [1484181.990639] [<ffffffff814780d6>] mutex_lock+0x16/0x30 [1484181.990645] [<ffffffffa03b0686>] cifs_reconnect_tcon+0x196/0x320 [cifs] [1484181.990650] [<ffffffffa03b08e9>] smb_init+0x39/0x70 [cifs] [1484181.990654] [<ffffffffa03b8814>] CIFSSMBQFSInfo+0x64/0x210 [cifs] [1484181.990657] [<ffffffffa03af47e>] cifs_statfs+0xce/0x160 [cifs] [1484181.990659] [<ffffffff811a6c61>] statfs_by_dentry+0xa1/0x140 [1484181.990661] [<ffffffff811a6d1b>] vfs_statfs+0x1b/0xb0 [1484181.990663] [<ffffffff811a6de7>] user_statfs+0x37/0x50 [1484181.990664] [<ffffffff811a6e80>] sys_statfs+0x20/0x40 [1484181.990667] [<ffffffff81481929>] system_call_fastpath+0x16/0x1b [1484301.779055] INFO: task pacman:28959 blocked for more than 120 seconds. [1484301.779058] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [1484301.779060] pacman D 0000000000000246 0 28959 28958 0x00000000 [1484301.779064] ffff8800215b9c18 0000000000000082 ffff8800cbc258b0 ffff8800215b9fd8 [1484301.779068] ffff8800215b9fd8 ffff8800215b9fd8 ffff880009fbb060 ffff8800cbc258b0 [1484301.779069] ffff8800215b9dc8 ffff8800215b9dc8 ffff88010ff610d0 ffff88010ff610d0 [1484301.779072] Call Trace: [1484301.779079] [<ffffffff81183164>] ? lookup_fast+0x44/0x310 [1484301.779082] [<ffffffff8120304c>] ? security_inode_permission+0x1c/0x30 [1484301.779086] [<ffffffff81479569>] schedule+0x29/0x70 [1484301.779088] [<ffffffff81479837>] schedule_preempt_disabled+0x27/0x40 [1484301.779090] [<ffffffff81477ec8>] __mutex_lock_slowpath+0x148/0x340 [1484301.779095] [<ffffffff814780d6>] mutex_lock+0x16/0x30 [1484301.779101] [<ffffffffa03b0686>] cifs_reconnect_tcon+0x196/0x320 [cifs] [1484301.779106] [<ffffffffa03b08e9>] smb_init+0x39/0x70 [cifs] [1484301.779109] [<ffffffffa03b8814>] CIFSSMBQFSInfo+0x64/0x210 [cifs] [1484301.779112] [<ffffffffa03af47e>] cifs_statfs+0xce/0x160 [cifs] [1484301.779115] [<ffffffff811a6c61>] statfs_by_dentry+0xa1/0x140 [1484301.779117] [<ffffffff811a6d1b>] vfs_statfs+0x1b/0xb0 [1484301.779118] [<ffffffff811a6de7>] user_statfs+0x37/0x50 [1484301.779120] [<ffffffff811a6e80>] sys_statfs+0x20/0x40 [1484301.779123] [<ffffffff81481929>] system_call_fastpath+0x16/0x1b [1484421.567540] INFO: task pacman:28959 blocked for more than 120 seconds. [1484421.567543] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [1484421.567545] pacman D 0000000000000246 0 28959 28958 0x00000000 [1484421.567549] ffff8800215b9c18 0000000000000082 ffff8800cbc258b0 ffff8800215b9fd8 [1484421.567552] ffff8800215b9fd8 ffff8800215b9fd8 ffff880009fbb060 ffff8800cbc258b0 [1484421.567554] ffff8800215b9dc8 ffff8800215b9dc8 ffff88010ff610d0 ffff88010ff610d0 [1484421.567557] Call Trace: [1484421.567564] [<ffffffff81183164>] ? lookup_fast+0x44/0x310 [1484421.567568] [<ffffffff8120304c>] ? security_inode_permission+0x1c/0x30 [1484421.567572] [<ffffffff81479569>] schedule+0x29/0x70 [1484421.567574] [<ffffffff81479837>] schedule_preempt_disabled+0x27/0x40 [1484421.567576] [<ffffffff81477ec8>] __mutex_lock_slowpath+0x148/0x340 [1484421.567582] [<ffffffff814780d6>] mutex_lock+0x16/0x30 [1484421.567587] [<ffffffffa03b0686>] cifs_reconnect_tcon+0x196/0x320 [cifs] [1484421.567592] [<ffffffffa03b08e9>] smb_init+0x39/0x70 [cifs] [1484421.567596] [<ffffffffa03b8814>] CIFSSMBQFSInfo+0x64/0x210 [cifs] [1484421.567599] [<ffffffffa03af47e>] cifs_statfs+0xce/0x160 [cifs] [1484421.567602] [<ffffffff811a6c61>] statfs_by_dentry+0xa1/0x140 [1484421.567604] [<ffffffff811a6d1b>] vfs_statfs+0x1b/0xb0 [1484421.567605] [<ffffffff811a6de7>] user_statfs+0x37/0x50 [1484421.567607] [<ffffffff811a6e80>] sys_statfs+0x20/0x40 [1484421.567610] [<ffffffff81481929>] system_call_fastpath+0x16/0x1b [1484541.356021] INFO: task pacman:28959 blocked for more than 120 seconds. [1484541.356025] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [1484541.356027] pacman D 0000000000000246 0 28959 28958 0x00000000 [1484541.356030] ffff8800215b9c18 0000000000000082 ffff8800cbc258b0 ffff8800215b9fd8 [1484541.356033] ffff8800215b9fd8 ffff8800215b9fd8 ffff880009fbb060 ffff8800cbc258b0 [1484541.356035] ffff8800215b9dc8 ffff8800215b9dc8 ffff88010ff610d0 ffff88010ff610d0 [1484541.356038] Call Trace: [1484541.356046] [<ffffffff81183164>] ? lookup_fast+0x44/0x310 [1484541.356050] [<ffffffff8120304c>] ? security_inode_permission+0x1c/0x30 [1484541.356053] [<ffffffff81479569>] schedule+0x29/0x70 [1484541.356056] [<ffffffff81479837>] schedule_preempt_disabled+0x27/0x40 [1484541.356058] [<ffffffff81477ec8>] __mutex_lock_slowpath+0x148/0x340 [1484541.356062] [<ffffffff814780d6>] mutex_lock+0x16/0x30 [1484541.356068] [<ffffffffa03b0686>] cifs_reconnect_tcon+0x196/0x320 [cifs] [1484541.356073] [<ffffffffa03b08e9>] smb_init+0x39/0x70 [cifs] [1484541.356077] [<ffffffffa03b8814>] CIFSSMBQFSInfo+0x64/0x210 [cifs] [1484541.356080] [<ffffffffa03af47e>] cifs_statfs+0xce/0x160 [cifs] [1484541.356082] [<ffffffff811a6c61>] statfs_by_dentry+0xa1/0x140 [1484541.356084] [<ffffffff811a6d1b>] vfs_statfs+0x1b/0xb0 [1484541.356086] [<ffffffff811a6de7>] user_statfs+0x37/0x50 [1484541.356087] [<ffffffff811a6e80>] sys_statfs+0x20/0x40 [1484541.356090] [<ffffffff81481929>] system_call_fastpath+0x16/0x1b [1484661.144493] INFO: task pacman:28959 blocked for more than 120 seconds. [1484661.144497] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [1484661.144499] pacman D 0000000000000246 0 28959 28958 0x00000000 [1484661.144502] ffff8800215b9c18 0000000000000082 ffff8800cbc258b0 ffff8800215b9fd8 [1484661.144506] ffff8800215b9fd8 ffff8800215b9fd8 ffff880009fbb060 ffff8800cbc258b0 [1484661.144508] ffff8800215b9dc8 ffff8800215b9dc8 ffff88010ff610d0 ffff88010ff610d0 [1484661.144510] Call Trace: [1484661.144517] [<ffffffff81183164>] ? lookup_fast+0x44/0x310 [1484661.144521] [<ffffffff8120304c>] ? security_inode_permission+0x1c/0x30 [1484661.144526] [<ffffffff81479569>] schedule+0x29/0x70 [1484661.144528] [<ffffffff81479837>] schedule_preempt_disabled+0x27/0x40 [1484661.144530] [<ffffffff81477ec8>] __mutex_lock_slowpath+0x148/0x340 [1484661.144534] [<ffffffff814780d6>] mutex_lock+0x16/0x30 [1484661.144540] [<ffffffffa03b0686>] cifs_reconnect_tcon+0x196/0x320 [cifs] [1484661.144545] [<ffffffffa03b08e9>] smb_init+0x39/0x70 [cifs] [1484661.144549] [<ffffffffa03b8814>] CIFSSMBQFSInfo+0x64/0x210 [cifs] [1484661.144552] [<ffffffffa03af47e>] cifs_statfs+0xce/0x160 [cifs] [1484661.144555] [<ffffffff811a6c61>] statfs_by_dentry+0xa1/0x140 [1484661.144557] [<ffffffff811a6d1b>] vfs_statfs+0x1b/0xb0 [1484661.144558] [<ffffffff811a6de7>] user_statfs+0x37/0x50 [1484661.144560] [<ffffffff811a6e80>] sys_statfs+0x20/0x40 [1484661.144563] [<ffffffff81481929>] system_call_fastpath+0x16/0x1b [1484780.932994] INFO: task pacman:28959 blocked for more than 120 seconds. [1484780.932998] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [1484780.932999] pacman D 0000000000000246 0 28959 28958 0x00000000 [1484780.933003] ffff8800215b9c18 0000000000000082 ffff8800cbc258b0 ffff8800215b9fd8 [1484780.933006] ffff8800215b9fd8 ffff8800215b9fd8 ffff880009fbb060 ffff8800cbc258b0 [1484780.933008] ffff8800215b9dc8 ffff8800215b9dc8 ffff88010ff610d0 ffff88010ff610d0 [1484780.933011] Call Trace: [1484780.933018] [<ffffffff81183164>] ? lookup_fast+0x44/0x310 [1484780.933022] [<ffffffff8120304c>] ? security_inode_permission+0x1c/0x30 [1484780.933025] [<ffffffff81479569>] schedule+0x29/0x70 [1484780.933028] [<ffffffff81479837>] schedule_preempt_disabled+0x27/0x40 [1484780.933030] [<ffffffff81477ec8>] __mutex_lock_slowpath+0x148/0x340 [1484780.933035] [<ffffffff814780d6>] mutex_lock+0x16/0x30 [1484780.933041] [<ffffffffa03b0686>] cifs_reconnect_tcon+0x196/0x320 [cifs] [1484780.933046] [<ffffffffa03b08e9>] smb_init+0x39/0x70 [cifs] [1484780.933050] [<ffffffffa03b8814>] CIFSSMBQFSInfo+0x64/0x210 [cifs] [1484780.933052] [<ffffffffa03af47e>] cifs_statfs+0xce/0x160 [cifs] [1484780.933055] [<ffffffff811a6c61>] statfs_by_dentry+0xa1/0x140 [1484780.933056] [<ffffffff811a6d1b>] vfs_statfs+0x1b/0xb0 [1484780.933058] [<ffffffff811a6de7>] user_statfs+0x37/0x50 [1484780.933060] [<ffffffff811a6e80>] sys_statfs+0x20/0x40 [1484780.933063] [<ffffffff81481929>] system_call_fastpath+0x16/0x1b [1485543.267793] CIFS VFS: Unexpected lookup error -19 [1485543.267842] CIFS VFS: Unexpected lookup error -19 [1485543.267856] CIFS VFS: Unexpected lookup error -19 [1485543.267868] CIFS VFS: Unexpected lookup error -19 [1485543.267880] CIFS VFS: Unexpected lookup error -19 [1485543.267891] CIFS VFS: Unexpected lookup error -19 [1485543.267902] CIFS VFS: Unexpected lookup error -19 [1485543.267914] CIFS VFS: Unexpected lookup error -19 [1485543.267925] CIFS VFS: Unexpected lookup error -19 [1485543.267936] CIFS VFS: Unexpected lookup error -19 [1485543.267960] CIFS VFS: Unexpected lookup error -19 Regards, Marti -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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