cifs causes BUG: soft lockup detected on CPU

[Valentin Zaharov]

Hi,
 
We have continous problem with server freezes. We are using cifs mounts
on apache powered web servers with content located on Win2k3 server.
Servers freeze from time to time, producing following error just before
freeze:

Mar 26 21:50:37 UFR2 kernel:  CIFS VFS: cifs_strtoUCS: char2uni returned
-22 Mar 26 21:51:45 UFR2 last message repeated 55 times Mar 26 21:52:49
UFR2 last message repeated 30 times Mar 26 21:54:16 UFR2 last message
repeated 10 times Mar 26 21:56:13 UFR2 last message repeated 20 times
Mar 26 21:58:34 UFR2 last message repeated 75 times Mar 26 21:59:43 UFR2
last message repeated 30 times Mar 26 22:01:02 UFR2 last message
repeated 30 times Mar 26 22:02:04 UFR2 last message repeated 30 times
Mar 26 22:03:08 UFR2 last message repeated 50 times Mar 26 22:04:27 UFR2
last message repeated 10 times Mar 26 22:05:59 UFR2 last message
repeated 20 times Mar 26 22:07:10 UFR2 last message repeated 20 times
Mar 26 22:29:00 UFR2 last message repeated 64 times Mar 27 00:47:40 UFR2
last message repeated 15 times Mar 27 01:42:41 UFR2 last message
repeated 95 times Mar 27 02:15:57 UFR2 last message repeated 90 times
Mar 27 02:27:13 UFR2 last message repeated 45 times Mar 27 03:14:08 UFR2
last message repeated 95 times Mar 27 04:26:10 UFR2 last message
repeated 2 times Mar 27 06:11:35 UFR2 last message repeated 45 times Mar
27 06:20:20 UFR2 last message repeated 15 times Mar 27 06:20:20 UFR2
last message repeated 12 times Mar 27 06:27:53 UFR2 kernel: BUG: soft
lockup detected on CPU#3!
Mar 27 06:27:53 UFR2 kernel:  [<c0134b57>] softlockup_tick+0x9e/0xac Mar
27 06:27:53 UFR2 kernel:  [<c0121440>] update_process_times+0x3b/0x5e
Mar 27 06:27:53 UFR2 kernel:  [<c010d885>]
smp_apic_timer_interrupt+0x6c/0x7a
Mar 27 06:27:53 UFR2 kernel:  [<c01032ec>]
apic_timer_interrupt+0x28/0x30 Mar 27 06:27:53 UFR2 kernel:
[<c0153d75>] generic_fillattr+0x75/0xa8 Mar 27 06:27:53 UFR2 kernel:
[<f8e78ed2>] cifs_getattr+0x1e/0x2b [cifs] Mar 27 06:27:53 UFR2 kernel:
[<f8e78eb4>] cifs_getattr+0x0/0x2b [cifs] Mar 27 06:27:53 UFR2 kernel:
[<c0153dc9>] vfs_getattr+0x21/0x30 Mar 27 06:27:53 UFR2 kernel:
[<c0153e93>] vfs_fstat+0x22/0x31 Mar 27 06:27:53 UFR2 kernel:
[<c015443a>] sys_fstat64+0xf/0x23 Mar 27 06:27:53 UFR2 kernel:
[<c0150fc5>] sys_open+0x1a/0x1c Mar 27 06:27:53 UFR2 kernel:
[<c0102820>] sysenter_past_esp+0x5d/0x81 Mar 27 06:27:53 UFR2 kernel:
[<c0310033>] xdr_xcode_array2+0x307/0x506 Mar 27 06:27:53 UFR2 kernel:
======================= Mar 27 06:27:54 UFR2 kernel: BUG: soft lockup
detected on CPU#0!
Mar 27 06:27:54 UFR2 kernel:  [<c0134b57>] softlockup_tick+0x9e/0xac Mar
27 06:27:54 UFR2 kernel:  [<c0121440>] update_process_times+0x3b/0x5e
Mar 27 06:27:54 UFR2 kernel:  [<c010d885>]
smp_apic_timer_interrupt+0x6c/0x7a
Mar 27 06:27:54 UFR2 kernel:  [<c01032ec>]
apic_timer_interrupt+0x28/0x30 Mar 27 06:27:54 UFR2 kernel:
[<c0153d69>] generic_fillattr+0x69/0xa8 Mar 27 06:27:54 UFR2 kernel:
[<f8e78ed2>] cifs_getattr+0x1e/0x2b [cifs] Mar 27 06:27:54 UFR2 kernel:
[<f8e78eb4>] cifs_getattr+0x0/0x2b [cifs] Mar 27 06:27:54 UFR2 kernel:
[<c0153dc9>] vfs_getattr+0x21/0x30 Mar 27 06:27:54 UFR2 kernel:
[<c0153e93>] vfs_fstat+0x22/0x31 Mar 27 06:27:54 UFR2 kernel:
[<c015443a>] sys_fstat64+0xf/0x23 Mar 27 06:27:54 UFR2 kernel:
[<c0150fc5>] sys_open+0x1a/0x1c Mar 27 06:27:54 UFR2 kernel:
[<c0102820>] sysenter_past_esp+0x5d/0x81 Mar 27 06:27:54 UFR2 kernel:
=======================

/etc/fstab
\\filer\sites /mnt/filer cifs
credentials=/root/domain.pass,domain=WEBDOM,port=139,rw,directio,nomapch
ars,noserverino,nobrl,ui
d=apache,gid=apache,iocharset=utf8,dir_mode=0755,file_mode=0755 0 0

Please advise,

Valentin Zaharov

System Department

NetVision Ltd.

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