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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-14428] Convert tracefile to use ring_buffer  from linux</title>
                <link>https://jira.whamcloud.com/browse/LU-14428</link>
                <project id="10000" key="LU">Lustre</project>
                    <description>&lt;p&gt;Linux contains a ring_buffer which supports low-overhead appends for messages.&lt;/p&gt;

&lt;p&gt;This is similar to the trace log in tracefile.c, but with lower overhead.&lt;/p&gt;

&lt;p&gt;Converting to use this removes a lot of code and reduces duplication for when we merge lustre upstream.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="62856">LU-14428</key>
            <summary>Convert tracefile to use ring_buffer  from linux</summary>
                <type id="4" iconUrl="https://jira.whamcloud.com/secure/viewavatar?size=xsmall&amp;avatarId=11310&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="4" iconUrl="https://jira.whamcloud.com/images/icons/priorities/minor.svg">Minor</priority>
                        <status id="1" iconUrl="https://jira.whamcloud.com/images/icons/statuses/open.png" description="The issue is open and ready for the assignee to start work on it.">Open</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="neilb">Neil Brown</assignee>
                                    <reporter username="neilb">Neil Brown</reporter>
                        <labels>
                    </labels>
                <created>Fri, 12 Feb 2021 05:32:44 +0000</created>
                <updated>Thu, 25 Jan 2024 17:59:29 +0000</updated>
                                                                                <due></due>
                            <votes>0</votes>
                                    <watches>9</watches>
                                                                            <comments>
                            <comment id="291841" author="gerrit" created="Fri, 12 Feb 2021 05:34:11 +0000"  >&lt;p&gt;Neil Brown (neilb@suse.de) uploaded a new patch: &lt;a href=&quot;https://review.whamcloud.com/41489&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://review.whamcloud.com/41489&lt;/a&gt;&lt;br/&gt;
Subject: &lt;a href=&quot;https://jira.whamcloud.com/browse/LU-14428&quot; title=&quot;Convert tracefile to use ring_buffer  from linux&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-14428&quot;&gt;LU-14428&lt;/a&gt; libcfs: discard cfs_trace_console_buffers[]&lt;br/&gt;
Project: fs/lustre-release&lt;br/&gt;
Branch: master&lt;br/&gt;
Current Patch Set: 1&lt;br/&gt;
Commit: f7e700300d43421b7cd295c8d5eee87d0ced52bf&lt;/p&gt;</comment>
                            <comment id="291842" author="gerrit" created="Fri, 12 Feb 2021 05:34:12 +0000"  >&lt;p&gt;Neil Brown (neilb@suse.de) uploaded a new patch: &lt;a href=&quot;https://review.whamcloud.com/41490&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://review.whamcloud.com/41490&lt;/a&gt;&lt;br/&gt;
Subject: &lt;a href=&quot;https://jira.whamcloud.com/browse/LU-14428&quot; title=&quot;Convert tracefile to use ring_buffer  from linux&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-14428&quot;&gt;LU-14428&lt;/a&gt; libcfs: discard cfs_trace_copyin_string()&lt;br/&gt;
Project: fs/lustre-release&lt;br/&gt;
Branch: master&lt;br/&gt;
Current Patch Set: 1&lt;br/&gt;
Commit: 58cef9a14e19af27b07df7a53a856611f165f54b&lt;/p&gt;</comment>
                            <comment id="291843" author="gerrit" created="Fri, 12 Feb 2021 05:34:13 +0000"  >&lt;p&gt;Neil Brown (neilb@suse.de) uploaded a new patch: &lt;a href=&quot;https://review.whamcloud.com/41491&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://review.whamcloud.com/41491&lt;/a&gt;&lt;br/&gt;
Subject: &lt;a href=&quot;https://jira.whamcloud.com/browse/LU-14428&quot; title=&quot;Convert tracefile to use ring_buffer  from linux&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-14428&quot;&gt;LU-14428&lt;/a&gt; libcfs: discard cfs_trace_allocate_string_buffer&lt;br/&gt;
Project: fs/lustre-release&lt;br/&gt;
Branch: master&lt;br/&gt;
Current Patch Set: 1&lt;br/&gt;
Commit: 22693103f08d000e02d5493680d80a2aaa9ec422&lt;/p&gt;</comment>
                            <comment id="291844" author="gerrit" created="Fri, 12 Feb 2021 05:34:13 +0000"  >&lt;p&gt;Neil Brown (neilb@suse.de) uploaded a new patch: &lt;a href=&quot;https://review.whamcloud.com/41492&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://review.whamcloud.com/41492&lt;/a&gt;&lt;br/&gt;
Subject: &lt;a href=&quot;https://jira.whamcloud.com/browse/LU-14428&quot; title=&quot;Convert tracefile to use ring_buffer  from linux&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-14428&quot;&gt;LU-14428&lt;/a&gt; libcfs: simplify task management in tracefile.c&lt;br/&gt;
Project: fs/lustre-release&lt;br/&gt;
Branch: master&lt;br/&gt;
Current Patch Set: 1&lt;br/&gt;
Commit: ea95f8115713d46bba2bc1d1e39ec3d3bed6baed&lt;/p&gt;</comment>
                            <comment id="291845" author="gerrit" created="Fri, 12 Feb 2021 05:34:14 +0000"  >&lt;p&gt;Neil Brown (neilb@suse.de) uploaded a new patch: &lt;a href=&quot;https://review.whamcloud.com/41493&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://review.whamcloud.com/41493&lt;/a&gt;&lt;br/&gt;
Subject: &lt;a href=&quot;https://jira.whamcloud.com/browse/LU-14428&quot; title=&quot;Convert tracefile to use ring_buffer  from linux&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-14428&quot;&gt;LU-14428&lt;/a&gt; libcfs: separate daemon_list from cfs_trace_data&lt;br/&gt;
Project: fs/lustre-release&lt;br/&gt;
Branch: master&lt;br/&gt;
Current Patch Set: 1&lt;br/&gt;
Commit: a6ad9f712ed5caf1b7cb71d30583a8d879a3e5f7&lt;/p&gt;</comment>
                            <comment id="295685" author="gerrit" created="Mon, 22 Mar 2021 16:26:11 +0000"  >&lt;p&gt;Oleg Drokin (green@whamcloud.com) merged in patch &lt;a href=&quot;https://review.whamcloud.com/41489/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://review.whamcloud.com/41489/&lt;/a&gt;&lt;br/&gt;
Subject: &lt;a href=&quot;https://jira.whamcloud.com/browse/LU-14428&quot; title=&quot;Convert tracefile to use ring_buffer  from linux&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-14428&quot;&gt;LU-14428&lt;/a&gt; libcfs: discard cfs_trace_console_buffers[]&lt;br/&gt;
Project: fs/lustre-release&lt;br/&gt;
Branch: master&lt;br/&gt;
Current Patch Set: &lt;br/&gt;
Commit: 95aa713f78e7acf992abda2fbb7242a6d0cc753d&lt;/p&gt;</comment>
                            <comment id="295686" author="gerrit" created="Mon, 22 Mar 2021 16:26:15 +0000"  >&lt;p&gt;Oleg Drokin (green@whamcloud.com) merged in patch &lt;a href=&quot;https://review.whamcloud.com/41490/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://review.whamcloud.com/41490/&lt;/a&gt;&lt;br/&gt;
Subject: &lt;a href=&quot;https://jira.whamcloud.com/browse/LU-14428&quot; title=&quot;Convert tracefile to use ring_buffer  from linux&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-14428&quot;&gt;LU-14428&lt;/a&gt; libcfs: discard cfs_trace_copyin_string()&lt;br/&gt;
Project: fs/lustre-release&lt;br/&gt;
Branch: master&lt;br/&gt;
Current Patch Set: &lt;br/&gt;
Commit: 67af976c806994cec27414d24b43f6519d72c240&lt;/p&gt;</comment>
                            <comment id="298477" author="gerrit" created="Sat, 10 Apr 2021 17:40:04 +0000"  >&lt;p&gt;Oleg Drokin (green@whamcloud.com) merged in patch &lt;a href=&quot;https://review.whamcloud.com/41491/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://review.whamcloud.com/41491/&lt;/a&gt;&lt;br/&gt;
Subject: &lt;a href=&quot;https://jira.whamcloud.com/browse/LU-14428&quot; title=&quot;Convert tracefile to use ring_buffer  from linux&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-14428&quot;&gt;LU-14428&lt;/a&gt; libcfs: discard cfs_trace_allocate_string_buffer&lt;br/&gt;
Project: fs/lustre-release&lt;br/&gt;
Branch: master&lt;br/&gt;
Current Patch Set: &lt;br/&gt;
Commit: a7a876a5e44125688a041679c77721416c67bb62&lt;/p&gt;</comment>
                            <comment id="299892" author="gerrit" created="Wed, 28 Apr 2021 02:10:55 +0000"  >&lt;p&gt;Oleg Drokin (green@whamcloud.com) merged in patch &lt;a href=&quot;https://review.whamcloud.com/41492/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://review.whamcloud.com/41492/&lt;/a&gt;&lt;br/&gt;
Subject: &lt;a href=&quot;https://jira.whamcloud.com/browse/LU-14428&quot; title=&quot;Convert tracefile to use ring_buffer  from linux&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-14428&quot;&gt;LU-14428&lt;/a&gt; libcfs: simplify task management in tracefile.c&lt;br/&gt;
Project: fs/lustre-release&lt;br/&gt;
Branch: master&lt;br/&gt;
Current Patch Set: &lt;br/&gt;
Commit: 6c5e6dd777a49ab06c38b880990b15393509ca87&lt;/p&gt;</comment>
                            <comment id="318826" author="gerrit" created="Mon, 22 Nov 2021 04:45:56 +0000"  >&lt;p&gt;&quot;Oleg Drokin &amp;lt;green@whamcloud.com&amp;gt;&quot; merged in patch &lt;a href=&quot;https://review.whamcloud.com/41493/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://review.whamcloud.com/41493/&lt;/a&gt;&lt;br/&gt;
Subject: &lt;a href=&quot;https://jira.whamcloud.com/browse/LU-14428&quot; title=&quot;Convert tracefile to use ring_buffer  from linux&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-14428&quot;&gt;LU-14428&lt;/a&gt; libcfs: separate daemon_list from cfs_trace_data&lt;br/&gt;
Project: fs/lustre-release&lt;br/&gt;
Branch: master&lt;br/&gt;
Current Patch Set: &lt;br/&gt;
Commit: 848738a85d82bb71cd91304c60a6a298d854157d&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10322">
                    <name>Gantt End to Start</name>
                                            <outwardlinks description="has to be done before">
                                        <issuelink>
            <issuekey id="75609">LU-16746</issuekey>
        </issuelink>
                            </outwardlinks>
                                                        </issuelinktype>
                            <issuelinktype id="10011">
                    <name>Related</name>
                                            <outwardlinks description="is related to ">
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            <issuekey id="47758">LU-9859</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
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            <issuekey id="79949">LU-17418</issuekey>
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            <issuekey id="67400">LU-15306</issuekey>
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        </issuelink>
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