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-13350 Lustre <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre> PID: 15742 TASK: ffff880fb4f1eeb0 CPU: 11 COMMAND: "mdt01_077" #0 [ffff880bd3f5eda8] __schedule at ffffffff816b3de4 #1 [ffff880bd3f5ee30] schedule at ffffffff816b4409 #2 [ffff880bd3f5ee40] rwsem_down_read_failed at ffffffff816b5a3d #3 [ffff880bd3f5eec8] call_rwsem_down_read_failed at ffffffff81338218 #4 [ffff880bd3f5ef18] down_read at ffffffff816b3520 #5 [ffff880bd3f5ef30] ldiskfs_xattr_block_set at ffffffffc13d3a8e [ldiskfs] #6 [ffff880bd3f5efb8] ldiskfs_expand_extra_isize_ea at ffffffffc13d4bc1 [ldiskfs] #7 [ffff880bd3f5f0b0] ldiskfs_mark_inode_dirty at ffffffffc1421254 [ldiskfs] #8 [ffff880bd3f5f108] ldiskfs_dirty_inode at ffffffffc1424960 [ldiskfs] #9 [ffff880bd3f5f128] __mark_inode_dirty at ffffffff81232e5d #10 [ffff880bd3f5f160] ldiskfs_mb_new_blocks at ffffffffc13f52cd [ldiskfs] #11 [ffff880bd3f5f240] ldiskfs_ind_map_blocks at ffffffffc13d8e5b [ldiskfs] #12 [ffff880bd3f5f3b8] ldiskfs_map_blocks at ffffffffc141ddd5 [ldiskfs] #13 [ffff880bd3f5f440] ldiskfs_getblk at ffffffffc141e295 [ldiskfs] #14 [ffff880bd3f5f4a0] ldiskfs_bread at ffffffffc141e457 [ldiskfs] #15 [ffff880bd3f5f4d8] ldiskfs_append at ffffffffc13e26c1 [ldiskfs] #16 [ffff880bd3f5f518] do_split at ffffffffc13e3e59 [ldiskfs] #17 [ffff880bd3f5f600] ldiskfs_dx_add_entry at ffffffffc13e701a [ldiskfs] #18 [ffff880bd3f5f750] __ldiskfs_add_entry at ffffffffc13e8624 [ldiskfs] #19 [ffff880bd3f5f7c0] osd_ldiskfs_add_entry at ffffffffc1471ef4 [osd_ldiskfs] #20 [ffff880bd3f5f818] __osd_ea_add_rec at ffffffffc1472767 [osd_ldiskfs] #21 [ffff880bd3f5f888] osd_index_ea_insert at ffffffffc147d356 [osd_ldiskfs] #22 [ffff880bd3f5f950] lod_sub_insert at ffffffffc151d355 [lod] #23 [ffff880bd3f5f9f0] lod_insert at ffffffffc14fb744 [lod] #24 [ffff880bd3f5fa00] __mdd_index_insert_only at ffffffffc12606cf [mdd] #25 [ffff880bd3f5fa48] __mdd_index_insert at ffffffffc1261565 [mdd] #26 [ffff880bd3f5fa90] mdd_create at ffffffffc126d6a8 [mdt] #27 [ffff880bd3f5fb88] mdt_create at ffffffffc1300369 [mdt] #28 [ffff880bd3f5fc38] mdt_reint_create at ffffffffc130083b [mdt] #29 [ffff880bd3f5fc68] mdt_reint_rec at ffffffffc1301d93 [mdt] #30 [ffff880bd3f5fc90] mdt_reint_internal at ffffffffc12e11bb [mdt] #31 [ffff880bd3f5fcc8] mdt_reint at ffffffffc12ec187 [mdt] #32 [ffff880bd3f5fcf8] tgt_request_handle at ffffffffc0ee18ba [ptlrpc] #33 [ffff880bd3f5fd40] ptlrpc_server_handle_request at ffffffffc0e86f13 [ptlrpc] #34 [ffff880bd3f5fde0] ptlrpc_main at ffffffffc0e8a862 [ptlrpc] #35 [ffff880bd3f5fec8] kthread at ffffffff810b4031 #36 [ffff880bd3f5ff50] ret_from_fork at ffffffff816c155d </pre> </div></div> LU-13350

ldiskfs deadlock during inode expansion

Bug Minor Resolved Not a Bug WC Triage Shaun Tancheff Tue, 10 Mar 2020 17:50:24 +0000 Wed, 11 Mar 2020 23:25:41 +0000 Wed, 11 Mar 2020 23:25:41 +0000 0 2 <p>A possible scenario for the deadlock is the following:<br/> step 1) Lustre filesystem is created with pre-i_projid mkfs tool<br/> step 2) a directory is created and filled with entries to the end of the directory block so creation of a new direntry will cause block allocation<br/> step 3) xattr for the directory inode is filled to the end of the free inode space<br/> step 4) Lustre filesystem is mounted with i_projid-aware ldiskfs module (Lustre upgrade)<br/> step 5) a new entry is created in the directory from step 2<br/> step 5.1) block allocation is requested under write sem<br/> step 5.2) __mark_inode_dirty() causes inode expansion due to ondisk format change<br/> step 5.3) xattrs cannot stay in the expanded inode and block allocation for xattrs is requested under read sem (DEADLOCK)</p> <p>Closing as not a bug since the fix is only needed for kernels 3.17 or earlier, RHEL 7.4 or earlier.</p> Development Rank 1|i00v9b: Rank (Obsolete) 9223372036854775807 Severity