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-17283 Lustre <p>This issue was created by maloo for Andreas Dilger &lt;adilger@whamcloud.com&gt;</p> <p>This issue relates to the following test suite run:<br/> <a href="https://testing.whamcloud.com/test_sets/f43b22b1-5c6c-444b-b9be-ecfe70a1c164" class="external-link" target="_blank" rel="nofollow noopener">https://testing.whamcloud.com/test_sets/f43b22b1-5c6c-444b-b9be-ecfe70a1c164</a></p> <p>Test session details:<br/> clients: <a href="https://build.whamcloud.com/job/lustre-master/4475" class="external-link" target="_blank" rel="nofollow noopener">https://build.whamcloud.com/job/lustre-master/4475</a> - 4.12.14-122.133-default<br/> servers: <a href="https://build.whamcloud.com/job/lustre-master/4475" class="external-link" target="_blank" rel="nofollow noopener">https://build.whamcloud.com/job/lustre-master/4475</a> - 4.18.0-477.27.1.el8_lustre.x86_64</p> <p>It looks like the sles12.5 client is crashing 100% of test runs on master right at unmount:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre> 2025.506089] Lustre: Unmounted lustre-client [ 2025.507805] BUG: unable to handle kernel NULL pointer dereference at 0000000000000050 [ 2025.509455] IP: wb_workfn+0x2b/0x450 [ 2025.511544] CPU: 0 PID: 282 Comm: kworker/u4:3 Tainted: G OE 4.12.14-122.133-default #1 SLE12-SP5 [ 2025.513428] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 [ 2025.514554] Workqueue: writeback wb_workfn [ 2025.516554] RIP: 0010:wb_workfn+0x2b/0x450 [ 2025.529303] Call Trace: [ 2025.532599] process_one_work+0x14c/0x390 [ 2025.533464] worker_thread+0x1c3/0x3e0 [ 2025.534241] kthread+0xf6/0x130 </pre> </div></div> <p>It looks like some kind of workqueue that is not flushed before unmount, or maybe RCU related?</p> <p>This is commit v2_15_58-183-g21295b169b (2 commits before 2.15.59).</p> LU-17283

sles12.5 always crashes at client unmount

Bug Critical Open Unresolved WC Triage Maloo Sat, 11 Nov 2023 00:15:51 +0000 Sun, 12 Nov 2023 21:05:58 +0000 Lustre 2.16.0 Lustre 2.16.0 0 5 <p>Do we need to worry about this? We're supporting the latest SLES15 SPx client for 2.16 and EOL is looming for this older version - <a href="https://endoflife.date/sles" class="external-link" target="_blank" rel="nofollow noopener">https://endoflife.date/sles</a></p> <p>It looks like this first started crashing on 2023-10-16 and has crashed for every test run since then. Patches landed at that time:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>$ git log --oneline --after 2023-10-14 --before 2023-10-17 a9411a9856 LU-17076 nrs: wait for RCU completion 8d82cf1413 LU-17015 gss: bump token buffer size to 16KiB 4c6290087b LU-12896 gss: key can be unlinked when timeout expires 6f5870dd87 LU-16218 utils: add component flags "prefrd" and "prefwr" b156790dea LU-17136 ldiskfs: increase max extent tree depth 16e4383e90 LU-17129 tests: cleanup fileset info on nodemaps 3df9e032db LU-17109 kernel: new kernel [SLES15 SP5 5.14.21-150500.55.22.1] ce54b5281c LU-17084 lod: fix comparision in lod_striping_load() 2b3371d5ee LU-16796 target: Change struct barrier_instance to use kref 067dfd8d27 LU-8191 libcfs: convert functions to static, removed function 2d8c7027e9 LU-16962 build: cleanup configure messages 7cce9f2d1c LU-15002 utils: disable meta_bg and enable packed_meta_blocks 51529fb57f LU-16966 osd: take trunc_lock for fallocate </pre> </div></div> <p>I don't see anything obvious that would affect the client. <em>Possibly</em> the SLES15 SP5 patch changed something in the configure/build, or <a href="https://jira.whamcloud.com/browse/LU-16962" title="Parallel build cleanup LC_REGISTER_SHRINKER_FORMAT_NAMED, LC_HAVE_FILEMAP_GET_FOLIOS_CONTIG, LN_CONFIG_STRSCPY_EXISTS" class="issue-link" data-issue-key="LU-16962"><del>LU-16962</del></a> caused a configure check to break and we're building with a bad kernel ABI?</p> <blockquote><p>7cce9f2d1c <a href="https://jira.whamcloud.com/browse/LU-15002" title="Allocate metagroup descriptors continuously if possible" class="issue-link" data-issue-key="LU-15002"><del>LU-15002</del></a> utils: disable meta_bg and enable packed_meta_blocks</p></blockquote> <p>probably a broken in the original ext4 but now enabled and exposed?</p> <p>But this is a <b>client</b> crash, since we don't run SLES12 servers in testing. </p> Development Rank 1|i041mn: Rank (Obsolete) 9223372036854775807 Severity