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-38 Lustre <p>When the sysadmins attempted to unmount the OSTs on a number of OSSs to shutdown them down for scheduled maintenance, six of the nodes kernel panicked.</p> <p>They all say:</p> <p> Kernel BUG at fs/ldiskfs/mballoc.c:3714</p> <p>RIP (for what its worth) is the same for each: :ldiskfs:ldiskfs_mb_release_inode_pa</p> <p>The stacks are also the same:</p> <p>sync_buffer<br/> out_of_line_wait_on_bit<br/> __wait_on_buffer<br/> :ldiskfs:bh_submit_read<br/> :ldiskfs:ldiskfs_mb_discard_inode_preallocations<br/> :ldiskfs:ldiskfs_discard_reservation<br/> :ldiskfs:ldiskfs_clear_node<br/> clear_inode<br/> dispose_list<br/> invalidate_inodes<br/> generic_shutdown_super<br/> kill_block_super<br/> deactivate_super<br/> mntput_no_expire<br/> :obdclass:unlock_mntput<br/> :obdclass:server_put_super<br/> invalidate_inodes<br/> generic_shutdown_super<br/> kill_anon_super<br/> :obdclass:lustre_kill_super<br/> deactivate_super<br/> mntput_no_expire<br/> path_release_on_umount<br/> sys_umount<br/> sys_newstat<br/> system_call</p> <p>I apologize for any typos. That had to be copied by hand.</p> lustre-1.8.3.0-6chaos_2.6.18_93chaos.ch4.3 LU-38

Kernel panic in ldiskfs on OST unmount

Bug Minor Resolved Fixed Lai Siyao Christopher Morrone Mon, 10 Jan 2011 18:40:24 +0000 Tue, 28 Jun 2011 15:01:39 +0000 Mon, 13 Jun 2011 14:41:50 +0000 Lustre 1.8.6 0 0 <p>Assigned to Alex for initial analysis. </p> <p>Christopher, can you confirm from the logs the devices were turned read-only? it looks to be instance of 24214 in bugzilla. </p> <p>It looks like "umount /dev/&lt;ostdev&gt;" does indeed turn the devices read-only as part of the shutdown process.</p> <p><a href="https://bugzilla.lustre.org/show_bug.cgi?id=16680" class="external-link" target="_blank" rel="nofollow noopener">bug 16680</a> explains the cause of this crash, and <a href="https://bugzilla.lustre.org/attachment.cgi?id=29345" class="external-link" target="_blank" rel="nofollow noopener">this patch</a> from <a href="https://bugzilla.lustre.org/show_bug.cgi?id=22299" class="external-link" target="_blank" rel="nofollow noopener">bug 22299</a> should be able to fix it. This fix has been landed on 1.8.4 and 2.0, because your version is 1.8.3, I think you apply it and verify. </p> <p>I applied the patch to our copy of ldiskfs.</p> <p>Please reopen if this reoccurs with the patches applied</p> Development Rank 1|hzw20f: Rank (Obsolete) 10407 Severity