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-4930 Lustre <p>Running racer with MDSCOUNT=4, migration disabled, and 2.5.57-90-gac5cd8f + <a href="http://review.whamcloud.com/#/c/9511/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/#/c/9511/</a>, I've seen this a few times. I don't think it's introduced by 9511.</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>PID: 23901 TASK: ffff8801438ea680 CPU: 2 COMMAND: "mdt_rdpg01_003" #0 [ffff88014d2838f8] machine_kexec at ffffffff81039950 #1 [ffff88014d283958] crash_kexec at ffffffff810d4372 #2 [ffff88014d283a28] panic at ffffffff81550d83 #3 [ffff88014d283aa8] lbug_with_loc at ffffffffa0ec9f1b [libcfs] #4 [ffff88014d283ac8] osd_object_destroy at ffffffffa05fca79 [osd_ldiskfs] #5 [ffff88014d283b28] lod_object_destroy at ffffffffa0839166 [lod] #6 [ffff88014d283b88] mdd_close at ffffffffa06e4ec8 [mdd] #7 [ffff88014d283bf8] mdt_mfd_close at ffffffffa0777af9 [mdt] #8 [ffff88014d283cb8] mdt_close at ffffffffa077a794 [mdt] #9 [ffff88014d283d18] tgt_request_handle at ffffffffa12ace85 [ptlrpc] #10 [ffff88014d283d78] ptlrpc_main at ffffffffa125dc31 [ptlrpc] #11 [ffff88014d283eb8] kthread at ffffffff8109eab6 #12 [ffff88014d283f48] kernel_thread at ffffffff8100c30a </pre> </div></div> LU-4930

osd_object_destroy()) ASSERTION( osd_inode_unlinked(inode) || inode->i_nlink == 1 || inode->i_nlink == 2 ) failed

Bug Minor Resolved Fixed Di Wang John Hammond racer Sat, 19 Apr 2014 02:00:59 +0000 Wed, 4 Jun 2014 23:16:00 +0000 Thu, 8 May 2014 05:40:51 +0000 Lustre 2.6.0 Lustre 2.6.0 0 3 <p>John, Could you please tell me which ASSERT which LBUG is referred to? Thanks.</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>[46132.503041] LustreError: 23901:0:(osd_handler.c:2477:osd_object_destroy()) ASSERTION( osd_inode_unlinked(inode) || inode-&gt;i_nlink == 1 || inode-&gt;i_nlink == 2 ) failed: [46132.505577] LustreError: 23901:0:(osd_handler.c:2477:osd_object_destroy()) LBUG [46132.506782] Pid: 23901, comm: mdt_rdpg01_003 </pre> </div></div> <p>There wasn't anything else in the logs from this thread.</p> <p>So did you ever see this failure in racer with no 9511 patch? IT's quite big and involved and cannot be excluded due to this I suspect.</p> <p>I only see it with 9511.</p> <p>Here you go:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>t:~# export MDSCOUNT=4 t:~# export MOUNT_2=y t:~# llmount.sh ... t:~# lfs mkdir -c4 /mnt/lustre/d0 t:~# exec 3&lt;/mnt/lustre/d0 t:~# cd /mnt/lustre/d0 t:d0# rmdir /mnt/lustre2/d0 t:d0# mkdir d1 d2 d3 d4 t:d0# cd .. t:lustre# exec 3&lt;&amp;- Message from syslogd@t at Apr 24 14:23:21 ... kernel:[ 86.589533] LustreError: 3971:0:(osd_handler.c:2477:osd_object_destroy()) ASSE\ RTION( osd_inode_unlinked(inode) || inode-&gt;i_nlink == 1 || inode-&gt;i_nlink == 2 ) failed: Message from syslogd@t at Apr 24 14:23:21 ... kernel:[ 86.594221] LustreError: 3971:0:(osd_handler.c:2477:osd_object_destroy()) LBUG </pre> </div></div> <p><a href="http://review.whamcloud.com/#/c/10110/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/#/c/10110/</a></p> <p>I hit the LBUG from <a href="https://jira.whamcloud.com/browse/LU-4930" title="osd_object_destroy()) ASSERTION( osd_inode_unlinked(inode) || inode-&gt;i_nlink == 1 || inode-&gt;i_nlink == 2 ) failed" class="issue-link" data-issue-key="LU-4930"><del>LU-4930</del></a> everytime I run sanity on a single node with MDSCOUNT=4 (at the end, usually in 300c). Unless I add 133g to SANITY_EXCEPT then it goes away.</p> <p>In conclusion, there is a DNE2 bug in some error handling path that is exposed by some weird proc bug. My hunch is that it's some funny business around the identity_upcall.</p> <p><a href="http://review.whamcloud.com/10170" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/10170</a> </p> <p>Both 9511 and 10170 have been landed to master, so this problem should be fixed.</p> Duplicate Related LU-4981 LU-3531 Development Rank 1|hzwkl3: Rank (Obsolete) 13630 Severity