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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>
    </build-info>


<item>
            <title>[LU-921] generate warnings in case of discarding dirty pages</title>
                <link>https://jira.whamcloud.com/browse/LU-921</link>
                <project id="10000" key="LU">Lustre</project>
                    <description>&lt;p&gt;&quot;NASA/AMES is asking for the ability to be able to tell users which files may be suspect after an&lt;br/&gt;
adverse cluster event; panics, hangs, client evictions, etc.&lt;/p&gt;


&lt;p&gt;One example that may be easier than others is when a client is evicted and the client is forced to&lt;br/&gt;
toss dirty pages of open files.  The site has been experimenting with a way to list the inode&lt;br/&gt;
numbers on the mds with the associated pages tossed on the clients.  I&apos;ll leave it to them to&lt;br/&gt;
discuss here.&lt;br/&gt;
&quot;  &amp;#8211; from Oracle BZ 21812.&lt;/p&gt;

&lt;p&gt;Oracle has released a patch (attachment 33114.) It affected client side. We like Whamcloud to include this patch for 1.8.x and 2.1.x.&lt;/p&gt;</description>
                <environment>sles10sp3, sles11sp1, centos5.6, centos6</environment>
        <key id="12661">LU-921</key>
            <summary>generate warnings in case of discarding dirty pages</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="hongchao.zhang">Hongchao Zhang</assignee>
                                    <reporter username="jaylan">Jay Lan</reporter>
                        <labels>
                    </labels>
                <created>Tue, 13 Dec 2011 18:10:04 +0000</created>
                <updated>Sat, 22 Dec 2012 11:15:43 +0000</updated>
                            <resolved>Sat, 22 Dec 2012 11:15:43 +0000</resolved>
                                    <version>Lustre 1.8.x (1.8.0 - 1.8.5)</version>
                                    <fixVersion>Lustre 2.4.0</fixVersion>
                    <fixVersion>Lustre 2.1.4</fixVersion>
                                        <due></due>
                            <votes>0</votes>
                                    <watches>5</watches>
                                                                            <comments>
                            <comment id="24709" author="pjones" created="Wed, 14 Dec 2011 09:51:02 +0000"  >&lt;p&gt;Hongchao&lt;/p&gt;

&lt;p&gt;Could you please look at what would be required to provide this capability in a Whamcloud release. The current approach needs several adjustments. Please talk to Johann for details.&lt;/p&gt;

&lt;p&gt;Peter&lt;/p&gt;</comment>
                            <comment id="24751" author="jaylan" created="Wed, 14 Dec 2011 15:04:10 +0000"  >&lt;p&gt;I cherry-picked Oracle&apos;s patch for our nas-1.8.6 branch without a problem. But, the patch applied to code that do not exist in 2.1. &lt;/p&gt;

&lt;p&gt;Our Lustre system admin consider this a very useful feature to them and we need your expertise to port the feature to 2.1. Thanks!&lt;/p&gt;</comment>
                            <comment id="25197" author="hongchao.zhang" created="Wed, 28 Dec 2011 05:20:39 +0000"  >&lt;p&gt;status update:&lt;br/&gt;
the patch is under creating and test.&lt;/p&gt;</comment>
                            <comment id="25286" author="hongchao.zhang" created="Fri, 30 Dec 2011 02:57:05 +0000"  >&lt;p&gt;the patch is tracked at &lt;a href=&quot;http://review.whamcloud.com/#change,1908&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://review.whamcloud.com/#change,1908&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="40772" author="jaylan" created="Mon, 18 Jun 2012 14:11:24 +0000"  >&lt;p&gt;There is no activity on this LU for almost 6 months. This fix is very important to use. Could you upgrade the priority? Thanks!&lt;/p&gt;</comment>
                            <comment id="40775" author="pjones" created="Mon, 18 Jun 2012 14:55:40 +0000"  >&lt;p&gt;Jay&lt;/p&gt;

&lt;p&gt;I will take this up with you offline&lt;/p&gt;

&lt;p&gt;Peter&lt;/p&gt;</comment>
                            <comment id="46622" author="hongchao.zhang" created="Tue, 16 Oct 2012 06:38:10 +0000"  >&lt;p&gt;the updated patch has been pushed to Gerrit&lt;/p&gt;</comment>
                            <comment id="47095" author="pjones" created="Tue, 30 Oct 2012 13:03:19 +0000"  >&lt;p&gt;Jay&lt;/p&gt;

&lt;p&gt;Can you please confirm whether the patch meets your needs?&lt;/p&gt;

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

&lt;p&gt;Peter&lt;/p&gt;</comment>
                            <comment id="47106" author="jaylan" created="Tue, 30 Oct 2012 14:39:12 +0000"  >&lt;p&gt;Hi Peter, certainly will do. Thanks~&lt;/p&gt;</comment>
                            <comment id="47182" author="jaylan" created="Tue, 30 Oct 2012 21:49:12 +0000"  >&lt;p&gt;I cherry-picked the patch into b2_1 branch. It was done cleanly. However, compilation failed:&lt;br/&gt;
/usr/src/packages/BUILD/lustre-2.1.3/lustre/llite/llite_lib.c:2256: error: &apos;OBD_IOC_GETDTNAME&apos; undeclared (first use in this function)&lt;/p&gt;</comment>
                            <comment id="47187" author="hongchao.zhang" created="Wed, 31 Oct 2012 07:09:14 +0000"  >&lt;p&gt;the OBD_IOC_GETDTNAME is introduced by &quot;http://review.whamcloud.com/#change,1646&quot; in &lt;a href=&quot;https://jira.whamcloud.com/browse/LU-819&quot; title=&quot;&amp;quot;lfs getstripe -M&amp;quot; broken&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-819&quot;&gt;&lt;del&gt;LU-819&lt;/del&gt;&lt;/a&gt;, did you apply that patch to b2_1?&lt;/p&gt;

&lt;p&gt;this patch needs ll_get_fsname redefined in &lt;a href=&quot;http://review.whamcloud.com/2025&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://review.whamcloud.com/2025&lt;/a&gt; &amp;amp;&amp;amp; &lt;a href=&quot;http://review.whamcloud.com/#change,3704&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://review.whamcloud.com/#change,3704&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;I have created a updated patch containing these missing stuff in b2_1, pls refs the attachment&lt;/p&gt;</comment>
                            <comment id="47220" author="jaylan" created="Wed, 31 Oct 2012 15:20:04 +0000"  >&lt;p&gt;I provide our Lustre group the new rpms and ask for feedback.&lt;/p&gt;</comment>
                            <comment id="47264" author="jaylan" created="Thu, 1 Nov 2012 15:16:53 +0000"  >&lt;p&gt;Why is recovery-small test 24 ALWAYS_EXCEPT?&lt;/p&gt;

&lt;p&gt;I think we can remove it from the ALWAYS_EXCEPT.&lt;/p&gt;</comment>
                            <comment id="47271" author="jaylan" created="Thu, 1 Nov 2012 19:30:48 +0000"  >&lt;p&gt;The test result looks good!&lt;/p&gt;

&lt;p&gt;Can you make changes to remove test &quot;24&quot; from ALWAYS_EXCEPT as part of the patch? Thanks!&lt;/p&gt;</comment>
                            <comment id="47272" author="pjones" created="Thu, 1 Nov 2012 19:33:16 +0000"  >&lt;p&gt;Jay that is really a separate issue and should be tracked as such. Could you please open a separate ticket to track the issue about test 24? Thanks!&lt;/p&gt;</comment>
                            <comment id="47273" author="jaylan" created="Thu, 1 Nov 2012 19:41:20 +0000"  >&lt;p&gt;Peter, a new test case recovery-small 24b was created to test this issue as part of the patch. That was how I discovered that test_24&lt;span class=&quot;error&quot;&gt;&amp;#91;ab&amp;#93;&lt;/span&gt; were skipped.&lt;/p&gt;

&lt;p&gt;Let me know if you want to fix that in this case, since recovery-small.sh is modified anyway, or you want me to open a new case. I am fine either way.&lt;/p&gt;</comment>
                            <comment id="47274" author="pjones" created="Thu, 1 Nov 2012 19:48:21 +0000"  >&lt;p&gt;Ah sorry - I did not realize that. In that case I will defer to Hongchao to comment.&lt;/p&gt;</comment>
                            <comment id="47281" author="hongchao.zhang" created="Fri, 2 Nov 2012 03:42:33 +0000"  >&lt;p&gt;Yes, this test is put into ALWAYS_EXCEPT in bz5494, and I tested it under master and b2_1, both passed locally,&lt;br/&gt;
I&apos;ll try to create a patch to remove it from A_E, and check whether it pass or not in Toro.&lt;/p&gt;</comment>
                            <comment id="47282" author="hongchao.zhang" created="Fri, 2 Nov 2012 04:05:47 +0000"  >&lt;p&gt;the patch is tracked at &lt;a href=&quot;http://review.whamcloud.com/#change,4443&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://review.whamcloud.com/#change,4443&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="48652" author="emoly.liu" created="Sun, 2 Dec 2012 20:23:40 +0000"  >&lt;p&gt;Port for b2_1 is here &lt;a href=&quot;http://review.whamcloud.com/#change,4716&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://review.whamcloud.com/#change,4716&lt;/a&gt;. I combine the two related patches into a single one.&lt;/p&gt;</comment>
                            <comment id="49607" author="pjones" created="Sat, 22 Dec 2012 11:15:43 +0000"  >&lt;p&gt;Landed for 2.1.4 and 2.4&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10011">
                    <name>Related</name>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="16958">LU-2505</issuekey>
        </issuelink>
                            </inwardlinks>
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                    </issuelinks>
                <attachments>
                            <attachment id="12011" name="patch.LU921.b2_1" size="11509" author="hongchao.zhang" created="Wed, 31 Oct 2012 07:09:07 +0000"/>
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