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<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>Hi all,</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'> I meet a system hang when trying do a
file-writing operation on 2 process in same node. Steps to duplicate</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'> 1.load_ocfs2 </span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'> 2. mkfs.ocfs2 -b 4 -L ocfs2 -m /ocfs
/dev/sdc2</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'> 3. mount /dev/sdc2 /ocfs -t ocfs2</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'> 4. process 1 writes to /ocfs2/testfile
1000 times at file-offset 100, in the meanwhile, process 2 writes to the same
file at the same offset. Then system hang with the following message from
dmesg:</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>##################################################3</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>kernel BUG at ll_rw_blk.c:1027!</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>invalid operand: 0000</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>ocfs2 lp parport autofs e100 e1000 floppy sg microcode
keybdev mousedev hid input usb-uhci usbcore ext3 jbd qla2300 qla2300_conf
aic7xxx sd_mod scsi_mod </span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>CPU: 0</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>EIP:
0060:[<c01bda27>] Not tainted</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>EFLAGS: 00010246</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>EIP is at __make_request [kernel] 0xb7
(2.4.22-1.2115.nptl)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>eax: 0000000c ebx: 00000000
ecx: 00000000 edx: dc43ec80</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>esi: 00000001 edi: 00f0a400
ebp: df0c4414 esp: dc223de8</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>ds: 0068 es: 0068 ss: 0068</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>Process ocfs2nm-0 (pid: 5034, stackpage=dc223000)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>Stack: dc43ec80 00000000 e0a96ba7 dff0be80 000000f0
c038ff98 e0a96e60 dcda7e00 </span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'> 5d700000 00000080
00000000 00000000 df0c4444 000007f9 00000000 00000001 </span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'> 0000002a 000007f9
dc43ec80 00000001 00f0a400 0000002a c01be1ea df0c4414 </span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>Call Trace: [<e0a96ba7>]
ocfs_bh_sem_alloc [ocfs2] 0x13 (0xdc223df0)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<e0a96e60>] ocfs_bh_sem_lookup [ocfs2] 0x134
(0xdc223e00)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<c01be1ea>] generic_make_request [kernel] 0xda
(0xdc223e40)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<e0a96fe5>] ocfs_bh_sem_lock [ocfs2] 0x21
(0xdc223e50)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<c01be297>] submit_bh [kernel] 0x57
(0xdc223e68)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<e0a9ad7f>] ocfs_read_bhs [ocfs2] 0x2b3
(0xdc223e90)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<e0a96bbe>] ocfs_bh_sem_free [ocfs2] 0x12
(0xdc223ea0)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<e0aa2bc1>] ocfs_volume_thread [ocfs2] 0x181
(0xdc223ee0)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<c0109b52>] ret_from_fork [kernel] 0x6
(0xdc223fbc)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<e0aa2a40>] ocfs_volume_thread [ocfs2] 0x0
(0xdc223fe0)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<c010741d>] kernel_thread_helper [kernel] 0x5
(0xdc223ff0)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>Code: 0f 0b 03 04 44 4f 29 c0 8b 4c 24 64 8b 15 f0 f8
3d c0 8b 41 </span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'> ------------[ cut here ]------------</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>kernel BUG at ll_rw_blk.c:1027!</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>invalid operand: 0000</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>ocfs2 lp parport autofs e100 e1000 floppy sg microcode
keybdev mousedev hid input usb-uhci usbcore ext3 jbd qla2300 qla2300_conf
aic7xxx sd_mod scsi_mod </span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>CPU: 0</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>EIP:
0060:[<c01bda27>] Not tainted</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>EFLAGS: 00010246</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>EIP is at __make_request [kernel] 0xb7
(2.4.22-1.2115.nptl)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>eax: 00000200 ebx: 00000001
ecx: 00000001 edx: dcedf580</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>esi: 00000001 edi: 00f0a400
ebp: df0c4414 esp: dcedbd80</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>ds: 0068 es: 0068 ss: 0068</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>Process kjournald (pid: 5036, stackpage=dcedb000)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>Stack: 00000039 00000048 00000202 00000001 00000001
00000001 00000001 df0c3000 </span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'> 00000287 00000200
00000000 00000000 df0c4444 defedc00 00000000 00000001 </span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'> 00001378 0003344c
dcedf580 00000001 00f0a400 00001378 c01be1ea df0c4414 </span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>Call Trace: [<c01be1ea>]
generic_make_request [kernel] 0xda (0xdcedbdd8)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<c01be297>] submit_bh [kernel] 0x57
(0xdcedbe00)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<c01476db>] __refile_buffer [kernel] 0x5b
(0xdcedbe14)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<c01be426>] ll_rw_block [kernel] 0xf6
(0xdcedbe28)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<e095991c>] journal_update_superblock_R8547d76d
[jbd] 0x5c (0xdcedbe50)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<e0956842>] journal_commit_transaction [jbd]
0x10f2 (0xdcedbe6c)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<c0119320>] recalc_task_prio [kernel] 0x90
(0xdcedbf0c)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<c011b389>] context_switch [kernel] 0x79
(0xdcedbf44)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<c0119e78>] schedule [kernel] 0x258
(0xdcedbf64)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<e0958c3a>] kjournald [jbd] 0x13a (0xdcedbfb8)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<e0958b00>] kjournald [jbd] 0x0 (0xdcedbfc4)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<e0958ae0>] commit_timeout [jbd] 0x0
(0xdcedbfd8)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<e0958b00>] kjournald [jbd] 0x0 (0xdcedbfe8)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>[<c010741d>] kernel_thread_helper [kernel] 0x5
(0xdcedbff0)</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>#################################################################33</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>Any ideas about it? </span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>Thanx. </span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><b><i><font size=2 color="#333399" face="Times New Roman"><span
lang=EN-US style='font-size:10.5pt;color:#333399;font-weight:bold;font-style:
italic'>Aaron</span></font></i></b></p>
<p class=MsoNormal><font size=2 color="#333399" face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:#333399'>Intel </span></font><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'><font color="#333399"><span style='color:#333399'>China</span></font><font color="#333399"><span
style='color:#333399'> Software Lab</span></font></span></font></p>
<p class=MsoNormal><font size=2 color="#333399" face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:#333399'>Tel:
8621-52574545 Ext.1587</span></font></p>
<p class=MsoNormal><font size=2 color="#333399" face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:#333399'>E_mail:<a
href="mailto:yukun.chen@intel.com">yukun.chen@intel.com</a></span></font></p>
<p class=MsoNormal><font size=2 face="Times New Roman"><span lang=EN-US> </span></font></p>
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