https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 https://jira.whamcloud.com/browse/LU-11506 Lustre <p>A recent usage with <tt>e2freefrag-1.42.13-wc5</tt> shows that it is calculating the free blocks and percentage of blocks for each bucket incorrectly:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>Device: /dev/mapper/lfs1_ost0015 Blocksize: 4096 bytes Total blocks: 15602810880 Free blocks: 22769561 (0.1%) Min. free extent: 4 KB Max. free extent: 115812 KB Avg. free extent: 10844 KB Num. free extent: 3172805 HISTOGRAM OF FREE EXTENT SIZES: Extent Size Range : Free extents Free Blocks Percent 4K... 8K- : 128938 128938 0.57% 8K... 16K- : 138698 332505 1.46% 16K... 32K- : 138806 721022 3.17% 32K... 64K- : 157230 1758685 7.72% 64K... 128K- : 180715 4102265 18.02% 128K... 256K- : 193026 8835597 38.80% 256K... 512K- : 191502 17473091 76.74% 512K... 1024K- : 202066 37180933 163.29% 1M... 2M- : 185758 68276323 299.86% 2M... 4M- : 176791 131489492 577.48% 4M... 8M- : 229272 312440019 1372.18% 8M... 16M- : 295202 857176672 3764.57% 16M... 32M- : 750785 5044129351 22152.95% 32M... 64M- : 203637 2112443487 9277.49% 64M... 128M- : 379 7350563 32.28% </pre> </div></div> <p>This is very likely due to a 32-bit overflow in the calculations.</p> LU-11506

e2freefrag calculates percentages incorrectly

Bug Minor Resolved Fixed Dongyang Li Andreas Dilger Thu, 11 Oct 2018 17:10:38 +0000 Thu, 11 Oct 2018 20:20:14 +0000 Thu, 11 Oct 2018 20:20:14 +0000 0 2 <p>It looks like this may already be fixed in v1.43.7-7-gf222de72 "<tt>e2freefrag: print 64bit free blocks count</tt>", so it will be fixed in our next e2fsprogs release.</p> <p>There was also commit v1.42.8-148-gd0550895 "<tt>e2freefrag: avoid integer overflow when reporting free space statistics</tt>", so it should already be in our e2fsprogs releases.</p> Related Development Rank 1|i0042f: Rank (Obsolete) 9223372036854775807 Severity