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<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">The first problem is as below:
</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">One issue is the files copied to the device but it can’t be list on node2, using ls –al the mounted directory.</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">But using debug.ocfs2 on node2, it is ok to list the files copied. After remount of the device on node2,
the file can be list.</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial"> </span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">The second is that:
</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Node1 is in the ocfs2 cluster, but using debug.ocfs2, and mounted.ocfs2 –f command, can not list the
node1 info.</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">The node2, node3 are list. And using debug.ocfs2, list the slotmap information, there is not node1.</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">But the heartbeat information on disk is ok.</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial"> </span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Ant there are lot of “echo 0 > /proc/sys/kernel/hung_task_timeout_secs” error message in the log.</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial"> </span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">We format the device with 32 node using the command:
</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">mkfs.ocfs2 -b 4k -C 1M -L target100 -T vmstore -N 32 /dev/sdb</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial"> </span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">So we have to delete the ocfs2 cluster, reboot nodes, and rebuild the ocfs2.</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">After all node joins into the cluster, we copy data again, and there are “echo 0 > /proc/sys/kernel/hung_task_timeout_secs”
message still. </span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial"> </span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.006781] INFO: task cp:22285 blocked for more than 120 seconds.</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.016123] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034724] cp D ffffffff81806240 0 22285 5313
0x00000000</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034729] ffff881b952658b0 0000000000000082 0000000000000000
0000000000000001</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034739] ffff881b95265fd8 ffff881b95265fd8 ffff881b95265fd8
0000000000013780</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034751] ffff880fc16044d0 ffff881fbe41ade0 ffff882027c13780
ffff881fbe41ade0</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034762] Call Trace:</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034769] [<ffffffff8165a55f>] schedule+0x3f/0x60</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034777] [<ffffffff8165c35d>] rwsem_down_failed_common+0xcd/0x170</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034808] [<ffffffffa059d399>] ? ocfs2_metadata_cache_unlock+0x19/0x20
[ocfs2]</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034815] [<ffffffff8165c435>] rwsem_down_read_failed+0x15/0x17</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034826] [<ffffffff813188d4>] call_rwsem_down_read_failed+0x14/0x30</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034833] [<ffffffff8165b754>] ? down_read+0x24/0x2b</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034859] [<ffffffffa0553b11>] ocfs2_start_trans+0xe1/0x1e0
[ocfs2]</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034878] [<ffffffffa052ab35>] ocfs2_write_begin_nolock+0x945/0x1c40
[ocfs2]</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034903] [<ffffffffa054cb90>] ? ocfs2_inode_is_valid_to_delete+0x1f0/0x1f0
[ocfs2]</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034927] [<ffffffffa053fa9c>] ? ocfs2_inode_lock_full_nested+0x52c/0xa90
[ocfs2]</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034939] [<ffffffff81647ae2>] ? balance_dirty_pages.isra.17+0x457/0x4ba</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034959] [<ffffffffa052bf26>] ocfs2_write_begin+0xf6/0x210
[ocfs2]</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034968] [<ffffffff8111752a>] generic_perform_write+0xca/0x210</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034991] [<ffffffffa053d9b9>] ? ocfs2_inode_unlock+0xb9/0x130
[ocfs2]</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.034998] [<ffffffff811176cd>] generic_file_buffered_write+0x5d/0x90</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.035023] [<ffffffffa054c601>] ocfs2_file_aio_write+0x821/0x870
[ocfs2]</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.035032] [<ffffffff81177342>] do_sync_write+0xd2/0x110</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.035043] [<ffffffff812d7448>] ? apparmor_file_permission+0x18/0x20</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.035052] [<ffffffff8129cc9c>] ? security_file_permission+0x2c/0xb0</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.035058] [<ffffffff811778d1>] ? rw_verify_area+0x61/0xf0</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.035064] [<ffffffff81177c33>] vfs_write+0xb3/0x180</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.035070] [<ffffffff81177f5a>] sys_write+0x4a/0x90</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Jun 20 20:42:01 H3CRDS11-RD kernel: [17509.035077] [<ffffffff81664a82>] system_call_fastpath+0x16/0x1b</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial"> </span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Is there some better advice or practice? Or is there some bug?</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial"> </span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">The information of the OS is as below and all the four node are installed same. :
</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">3.2.0</span></font><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">-23-generic
#36-Ubuntu SMP Tue Apr 10 20:39:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial"> </span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">The host information as below:
</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial"># free
</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial"> total used free shared buffers cached</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Mem: 132028152 104355680 27672472 0 171496 69113032</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">-/+ buffers/cache: 35071152 96957000</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Swap: 34523132 0 34523132</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial"> </span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Cpu information:
</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Architecture: x86_64</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">CPU op-mode(s): 32-bit, 64-bit</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Byte Order: Little Endian</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">CPU(s): 24</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">On-line CPU(s) list: 0-23</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Thread(s) per core: 2</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Core(s) per socket: 6</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Socket(s): 2</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">NUMA node(s): 2</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Vendor ID: GenuineIntel</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">CPU family: 6</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Model: 44</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Stepping: 2</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">CPU MHz: 2532.792</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">BogoMIPS: 5065.22</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Virtualization: VT-x</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">L1d cache: 32K</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">L1i cache: 32K</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">L2 cache: 256K</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">L3 cache: 12288K</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">NUMA node0 CPU(s): 0,2,4,6,8,10,12,14,16,18,20,22</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">NUMA node1 CPU(s): 1,3,5,7,9,11,13,15,17,19,21,23</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial"> </span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial"> </span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial">Thanks</span></font></p>
<p class="MsoNormal" style="text-indent:18.0pt"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt; line-height:150%; font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font size="2" face="Times New Roman"><span lang="EN-US"> </span></font></p>
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