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-7304 Lustre <p>When trying to run benchmarking with bigalloc feature, mkfs always failed<br/> and dmesg gave following errors:</p> <p>LDISKFS-fs error (device sdb): ldiskfs_mb_check_ondisk_bitmap:3611: comm mkdir: on-disk bitmap for group 8corrupted: 0 blocks free in bitmap, 32768 - in gd</p> Centos7 LU-7304

ldiskfs bug when bigalloc feature enabled

Bug Minor Resolved Fixed Yang Sheng Wang Shilong patch Thu, 15 Oct 2015 12:48:26 +0000 Tue, 30 Aug 2016 14:32:05 +0000 Wed, 11 Nov 2015 18:03:02 +0000 Lustre 2.8.0 0 5 <p>Wang Shilong (wshilong@ddn.com) uploaded a new patch: <a href="http://review.whamcloud.com/16832" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/16832</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-7304" title="ldiskfs bug when bigalloc feature enabled" class="issue-link" data-issue-key="LU-7304"><del>LU-7304</del></a> ldiskfs: fix bug when bigalloc is enabled<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: fedfa16aebe7c1a424f33adf3ef29b4944f1fcc1</p> <p>Hi Yang Sheng,<br/> Could you please have a look at this patch?<br/> Thanks.<br/> Joe</p> <p>Thank you for the patch. We have never tested Lustre with the <tt>bigalloc</tt> feature enabled, though in theory it could provide an improvement for OST performance for large file IO, and also to reduce directory block fragmentation.</p> <p>This will cause small files to consume more space - a whole chunk will be allocated even for very small files. Fortunately, it will still only write 4KB blocks of data rather than the whole chunk.</p> <p>There may be some assumptions in the osd-ldiskfs code about block sizes and chunks, so it is worthwhile to at least look through the block allocation routines to see if there are any problems. I don't <em>think</em> this will affect statfs() since the filesystem blocksize will still remain at 4KB.</p> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="http://review.whamcloud.com/16832/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/16832/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-7304" title="ldiskfs bug when bigalloc feature enabled" class="issue-link" data-issue-key="LU-7304"><del>LU-7304</del></a> ldiskfs: fix bug when bigalloc is enabled<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 26adc2e13a877507b483b2d3c3e873fbd13d2596</p> <p>Landed for 2.8</p> Duplicate Development Rank 1|hzxqjb: Rank (Obsolete) 9223372036854775807 Severity