Whamcloud Community JIRA https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 [LU-16843] ext4 extent tree should be able to shrink https://jira.whamcloud.com/browse/LU-16843 Lustre <p>ext4's extent code doesn't handle cases when extents merge/collapse. for example, one can create a sparse file like this</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"> EXTENTS: (ETB0):33409 (0):34816 (2):34818 (4):34820 (6):34822 (8):34824 (10):34826 (12):34828 (14):34830 (16):34832 (18):34834 (20):34836 (22):34838 (24):34840 (26):34842 (28):34844 (30):34846 (32):34848 (34):34850 (36):34852 (38):34854 (40):34856 (42):34858 (44):34860 (46):34862 (48):34864 (50):34866 </pre> </div></div> <p>then fill the holes and get an extent tree like this one:</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"> EXTENTS: (ETB0):33409 (0-1):34816-34817 (ETB0):33411 (2-679):34818-35495 (ETB0):33410 (680-998):35496-35814 </pre> </div></div> <p>where 2 blocks are used to store 2 mergable extents.</p> LU-16843 ext4 extent tree should be able to shrink Improvement Minor Resolved Fixed Alex Zhuravlev Alex Zhuravlev Tue, 23 May 2023 13:18:32 +0000 Sat, 27 Jan 2024 15:49:00 +0000 Thu, 27 Jul 2023 13:54:49 +0000 Lustre 2.16.0 0 3 <p>"Alex Zhuravlev &lt;bzzz@whamcloud.com&gt;" uploaded a new patch: <a href="https://review.whamcloud.com/c/fs/lustre-release/+/51096" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/c/fs/lustre-release/+/51096</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-16843" title="ext4 extent tree should be able to shrink" class="issue-link" data-issue-key="LU-16843"><del>LU-16843</del></a> ldiskfs: merge extent blocks<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 2bc86de650dde674fe7db0930e819d48eecf29cf</p> <p>"Oleg Drokin &lt;green@whamcloud.com&gt;" merged in patch <a href="https://review.whamcloud.com/c/fs/lustre-release/+/51096/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/c/fs/lustre-release/+/51096/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-16843" title="ext4 extent tree should be able to shrink" class="issue-link" data-issue-key="LU-16843"><del>LU-16843</del></a> ldiskfs: merge extent blocks<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 0f7e6c02a9ea5b85d8d97f724bed318268cea60f</p> <p>Landed for 2.16</p> <p>"Li Dongyang &lt;dongyangli@ddn.com&gt;" uploaded a new patch: <a href="https://review.whamcloud.com/c/fs/lustre-release/+/53323" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/c/fs/lustre-release/+/53323</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-16843" title="ext4 extent tree should be able to shrink" class="issue-link" data-issue-key="LU-16843"><del>LU-16843</del></a> ldiskfs: extend journal before merging extent blocks<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 0cab2031c9d11acbfede8fbd34177b0ac331fe6a</p> Related LU-17136 LU-17337 LU-17187 Development Rank 1|i03m1r: Rank (Obsolete) 9223372036854775807 Severity