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    <title>Whamcloud Community JIRA</title>
    <link>https://jira.whamcloud.com</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.4.14</version>
        <build-number>940014</build-number>
        <build-date>05-12-2023</build-date>
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<item>
            <title>[LU-1501] Kernel panic - not syncing: Cannot find space for the kernel page tables</title>
                <link>https://jira.whamcloud.com/browse/LU-1501</link>
                <project id="10000" key="LU">Lustre</project>
                    <description>&lt;p&gt;Hello,&lt;/p&gt;

&lt;p&gt;One of our, DDN Japan, customer faced kernel panic with RIP in &quot;RIP  &lt;span class=&quot;error&quot;&gt;&amp;#91;&amp;lt;ffffffffa07a32e3&amp;gt;&amp;#93;&lt;/span&gt; ll_readahead+0x43/0x1d20 &lt;span class=&quot;error&quot;&gt;&amp;#91;lustre&amp;#93;&lt;/span&gt;&quot;.&lt;br/&gt;
Attached is the console log of this client.&lt;/p&gt;

&lt;p&gt;Could you check if this is Kernel/BIOS issue or Lustre issue?&lt;/p&gt;

&lt;p&gt;Many thanks,&lt;br/&gt;
Minoru@DDN Japan&lt;/p&gt;</description>
                <environment>Clients: SGI UV1000&lt;br/&gt;
kernel: 2.6.32-131.0.15.el6.x86_64&lt;br/&gt;
lustre: 1.8.7 wc1</environment>
        <key id="14831">LU-1501</key>
            <summary>Kernel panic - not syncing: Cannot find space for the kernel page tables</summary>
                <type id="1" iconUrl="https://jira.whamcloud.com/secure/viewavatar?size=xsmall&amp;avatarId=11303&amp;avatarType=issuetype">Bug</type>
                                            <priority id="4" iconUrl="https://jira.whamcloud.com/images/icons/priorities/minor.svg">Minor</priority>
                        <status id="5" iconUrl="https://jira.whamcloud.com/images/icons/statuses/resolved.png" description="A resolution has been taken, and it is awaiting verification by reporter. From here issues are either reopened, or are closed.">Resolved</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="1">Fixed</resolution>
                                        <assignee username="bobijam">Zhenyu Xu</assignee>
                                    <reporter username="mhamakawa">Minoru Hamakawa</reporter>
                        <labels>
                            <label>client</label>
                    </labels>
                <created>Mon, 11 Jun 2012 07:11:24 +0000</created>
                <updated>Wed, 20 Jun 2012 08:40:29 +0000</updated>
                            <resolved>Wed, 20 Jun 2012 08:40:29 +0000</resolved>
                                    <version>Lustre 1.8.7</version>
                                                        <due></due>
                            <votes>0</votes>
                                    <watches>5</watches>
                                                                            <comments>
                            <comment id="40338" author="pjones" created="Mon, 11 Jun 2012 08:41:21 +0000"  >&lt;p&gt;Bobijam&lt;/p&gt;

&lt;p&gt;Could you please help with this one?&lt;/p&gt;

&lt;p&gt;Thanks&lt;/p&gt;

&lt;p&gt;Peter&lt;/p&gt;</comment>
                            <comment id="40536" author="ihara" created="Wed, 13 Jun 2012 19:41:39 +0000"  >&lt;p&gt;Bobijam, &lt;/p&gt;

&lt;p&gt;Could you please have a look at the log files and advise us first analysis if the lustre is related?&lt;/p&gt;</comment>
                            <comment id="40537" author="bobijam" created="Wed, 13 Jun 2012 20:56:58 +0000"  >&lt;p&gt;what does the fat_panic_log come about? is it the same client? that part is not a lustre issue.&lt;/p&gt;

&lt;p&gt;Can you get the crash dump of the node?&lt;/p&gt;</comment>
                            <comment id="40538" author="mhamakawa" created="Wed, 13 Jun 2012 21:08:35 +0000"  >&lt;p&gt;Thank you, Bobijam,&lt;/p&gt;

&lt;p&gt;Yes. it&apos;s same client. And both files are console output of that client.&lt;br/&gt;
Will ask about crash dump and time relation between two files.&lt;/p&gt;

&lt;p&gt;Many thanks,&lt;br/&gt;
Minoru&lt;/p&gt;</comment>
                            <comment id="40548" author="mhamakawa" created="Thu, 14 Jun 2012 04:12:58 +0000"  >&lt;p&gt;Hi Bojijam,&lt;/p&gt;

&lt;p&gt;I upload whole console log and crash dump under /upload/&lt;a href=&quot;https://jira.whamcloud.com/browse/LU-1501&quot; title=&quot;Kernel panic - not syncing: Cannot find space for the kernel page tables&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-1501&quot;&gt;&lt;del&gt;LU-1501&lt;/del&gt;&lt;/a&gt;.&lt;br/&gt;
Could you look at this?&lt;br/&gt;
We can see there are lots of mce log, two hours ago of the panic.. &lt;/p&gt;

&lt;p&gt;Many thanks,&lt;br/&gt;
Minoru&lt;/p&gt;</comment>
                            <comment id="40549" author="bobijam" created="Thu, 14 Jun 2012 04:50:28 +0000"  >&lt;p&gt;the console.log uploaded under /upload/&lt;a href=&quot;https://jira.whamcloud.com/browse/LU-1501&quot; title=&quot;Kernel panic - not syncing: Cannot find space for the kernel page tables&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-1501&quot;&gt;&lt;del&gt;LU-1501&lt;/del&gt;&lt;/a&gt; shows the same kernel error as fat_panic.log showed.&lt;/p&gt;

&lt;p&gt;I&apos;m afraid the uploaded &quot;uvdmp_26_2012_6_1_17_22&quot; is not what I want, it says &quot;uvdmp - UV Hub and NL5 Router MMR Capture Utility - Version 2.05&quot; in it, is it a network captured data?&lt;/p&gt;

&lt;p&gt;What I meant is the kernel core dump file with its uncompressed kernel image which we can check what possibly happened when the system crashed.&lt;/p&gt;</comment>
                            <comment id="40550" author="mhamakawa" created="Thu, 14 Jun 2012 05:12:20 +0000"  >&lt;p&gt;I&apos;m sorry I upload it without dump..&lt;/p&gt;</comment>
                            <comment id="40764" author="mhamakawa" created="Mon, 18 Jun 2012 12:12:50 +0000"  >&lt;p&gt;Hi Bojijam,&lt;/p&gt;

&lt;p&gt;They couldn&apos;t get any kernel dump this time..&lt;br/&gt;
Could you check whether the root cause of the panic is related to lustre or not with only console msg?&lt;/p&gt;

&lt;p&gt;Many thanks,&lt;br/&gt;
Minoru&lt;/p&gt;</comment>
                            <comment id="40765" author="bobijam" created="Mon, 18 Jun 2012 12:44:59 +0000"  >&lt;p&gt;the log.txt relates to Lustre and the fat_panic_log does not, does the system has memory issue?&lt;/p&gt;</comment>
                            <comment id="40767" author="mhamakawa" created="Mon, 18 Jun 2012 13:33:19 +0000"  >&lt;p&gt;We can see followings in /var/log/messages before that panic happened.&lt;br/&gt;
MEMLOG&lt;span class=&quot;error&quot;&gt;&amp;#91;44377&amp;#93;&lt;/span&gt;: r001i23b07 P0D-DIMM1A has a failed DRAM and must be replaced soon. Exposure to Uncorrected Error is high&lt;/p&gt;</comment>
                            <comment id="40818" author="bobijam" created="Mon, 18 Jun 2012 21:48:45 +0000"  >&lt;p&gt;I&apos;d say it&apos;s mostly like a hardware problem in this case (memory failure).&lt;/p&gt;</comment>
                            <comment id="40917" author="mhamakawa" created="Wed, 20 Jun 2012 07:15:55 +0000"  >&lt;p&gt;Agreeded. If they face same panic without hardware error, I&apos;ll open this again.&lt;br/&gt;
So please close this.&lt;br/&gt;
Many thanks.&lt;/p&gt;</comment>
                            <comment id="40919" author="pjones" created="Wed, 20 Jun 2012 08:40:29 +0000"  >&lt;p&gt;ok thanks!&lt;/p&gt;</comment>
                    </comments>
                    <attachments>
                            <attachment id="11555" name="fat_panic_log" size="1841" author="mhamakawa" created="Mon, 11 Jun 2012 07:11:24 +0000"/>
                            <attachment id="11556" name="log.txt" size="4396" author="mhamakawa" created="Mon, 11 Jun 2012 07:11:24 +0000"/>
                            <attachment id="11619" name="messages.0611" size="624973" author="mhamakawa" created="Mon, 18 Jun 2012 13:31:42 +0000"/>
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