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<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">Hi</span>，<span lang="EN-US"> I am using ocfs2 for test and find one issue, would
someone give some help about it.</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US"></span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">The background is that we are using ocfs2 over iSCSI on Ubuntu 12.04, with kernel
version 3.2.0-23. </span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">Linux 3.2.0-23-generic x86_64 GNU/Linux</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US"></span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">We changed the configuration file of iSCSI, initiatorname.iscsi file, so as to restart
the iSCSI service with the command "service open-iscsi restart".</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">After the restart of iscsi service, the device that ocfs2 using is missed, and the
log is written to kern.log as below: </span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">Jun 5 09:10:06 vmc-7 kernel: [45946.187897] sd 6:0:0:13: [sde] Attached SCSI disk</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">Jun 5 09:10:07 vmc-7 kernel: [45946.439225] (o2hb-692FC96E2F,2786,5):o2hb_bio_end_io:389
ERROR: IO Error -19</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">Jun 5 09:10:07 vmc-7 kernel: [45946.439673] (o2hb-692FC96E2F,2786,5):o2hb_do_disk_heartbeat:1017
ERROR: status = -19</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">Jun 5 09:10:07 vmc-7 kernel: [45947.117979] (o2hb-58592532BC,2804,2):o2hb_bio_end_io:389
ERROR: IO Error -19</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">Jun 5 09:10:07 vmc-7 kernel: [45947.118413]</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">... ... .... ...</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US"> (o2hb-58592532BC,2804,0):o2hb_bio_end_io:389 ERROR: IO Error -19</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">Jun 5 09:10:53 vmc-7 kernel: [45993.143578] (o2hb-58592532BC,2804,0):o2hb_do_disk_heartbeat:1017
ERROR: status = -19</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US"></span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">The heartbeat timeout is 31 seconds configured as below.</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US"># O2CB_HEARTBEAT_THRESHOLD: Iterations before a node is considered dead.</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">O2CB_HEARTBEAT_THRESHOLD=31</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US"></span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">root@vmc-7:/sys/kernel/config/cluster/iPool/heartbeat# cat dead_threshold
</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">31</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US"></span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">Why elapse more than 50 seconds, the server does not reset?</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US"></span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">I review the code of kernel with version 3.2.2, and puzzled with heartbeat code as
below, is it right that the loop does not break out so as the server does not reset.
</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">static int o2hb_thread(void *data)</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">{</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US"> ... ... ...</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">
</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US"> while (!kthread_should_stop() &&</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US"> !reg->hr_unclean_stop && !reg->hr_aborted_start) {</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">
</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US"> }</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">}</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US"></span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">In the function o2hb_do_disk_heartbeat(struct o2hb_region *reg), while
</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">ret = o2hb_read_slots(reg, highest_node + 1); error with 19, ENODEV, the device may
be does not existed for the iSCSI service restart.</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US"></span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">Is anything wrong with it?
</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US"></span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US">Thanks.</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent:18.0pt"><font size="1" face="宋体"><span style="font-size:9.0pt; line-height:150%"><span style="line-height:150%"> <span lang="EN-US"></span></span></span></font></p>
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