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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-13725] Reads &amp; Writes are blocked during Memory Map File Remap on win/solaris</title>
                <link>https://jira.mongodb.org/browse/SERVER-13725</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Background&lt;/p&gt;
&lt;p/&gt;
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&lt;p/&gt;

&lt;p&gt;&lt;b&gt;&lt;ins&gt;Problem&lt;/ins&gt;&lt;/b&gt;: Remap on Windows &amp;amp; Solaris is not atomic, we need to guard access to memory while mmap is occuring.&lt;br/&gt;
&lt;b&gt;&lt;ins&gt;Fix&lt;/ins&gt;&lt;/b&gt;: Since there is only one writer, we only need to guard readers against remap. Add a dedicated lock for this, and do not use the LockMongoFilesxxx&lt;/p&gt;

&lt;p&gt;The writer does not need the lock since he has sequential consistency, he either reads/writes view or remaps, not both at the same time.&lt;/p&gt;</description>
                <environment></environment>
        <key id="133203">SERVER-13725</key>
            <summary>Reads &amp; Writes are blocked during Memory Map File Remap on win/solaris</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="mark.benvenuto@mongodb.com">Mark Benvenuto</assignee>
                                    <reporter username="mark.benvenuto@mongodb.com">Mark Benvenuto</reporter>
                        <labels>
                    </labels>
                <created>Thu, 24 Apr 2014 19:55:12 +0000</created>
                <updated>Wed, 4 Jun 2014 15:00:21 +0000</updated>
                            <resolved>Fri, 30 May 2014 18:48:14 +0000</resolved>
                                    <version>2.4.10</version>
                    <version>2.6.0</version>
                                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="602821" author="mark.benvenuto" created="Fri, 30 May 2014 18:47:51 +0000"  >&lt;p&gt;After more investigation, particularly on Solaris, this is not an issue since the LockMongoFilesShared lock only exists on Windows. On Windows, this issue does not have to be fixed after LockMongoFilesShared is removed from the flush code path in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-13729&quot; title=&quot;Reads &amp;amp; Writes are blocked during data file allocation on Windows&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-13729&quot;&gt;&lt;del&gt;SERVER-13729&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="78098">SERVER-9868</issuekey>
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            <issuelink>
            <issuekey id="114461">SERVER-12880</issuekey>
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            <issuelink>
            <issuekey id="128814">SERVER-13444</issuekey>
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