[LU-13089] ASSERTION( (((( lock))->l_flags & (1ULL << 50)) != 0) ) failed

• Type: Bug
• Resolution: Duplicate
• Priority: Critical
• Affects Version/s: Lustre 2.12.4
• Labels: llnl
• Severity: 3
• Assignee: WC Triage
• Reporter: Oleg Drokin

Description

I hit this in b2_12-next testing, but there's nothing I see in there that appears related so I think this is just super rare race that's pretty similar in nature to LU-4269

except this time it's glimpse cb vs cancel cb race

console gives us:

[19625.122592] LustreError: 8347:0:(ldlm_lock.c:213:ldlm_lock_put()) ASSERTION( (((( lock))->l_flags & (1ULL << 50)) != 0) ) failed: 
[19625.124370] LustreError: 8347:0:(ldlm_lock.c:213:ldlm_lock_put()) LBUG
[19625.124704] LustreError: 8367:0:(ldlm_lock.c:205:ldlm_lock_put()) ASSERTION( atomic_read(&lock->l_refc) > 0 ) failed: 
[19625.124705] LustreError: 8367:0:(ldlm_lock.c:205:ldlm_lock_put()) LBUG
[19625.124706] Pid: 8367, comm: ldlm_bl_02 3.10.0-7.7-debug #1 SMP Wed Oct 30 09:43:00 EDT 2019
[19625.124707] Call Trace:
[19625.124739]  [<ffffffffa01f97dc>] libcfs_call_trace+0x8c/0xc0 [libcfs]
[19625.124744]  [<ffffffffa01f988c>] lbug_with_loc+0x4c/0xa0 [libcfs]
[19625.124796]  [<ffffffffa0638197>] ldlm_lock_put+0x557/0x730 [ptlrpc]
[19625.124821]  [<ffffffffa0639980>] ldlm_lock_destroy_nolock+0x50/0x110 [ptlrpc]
[19625.124839]  [<ffffffffa063febf>] ldlm_lock_cancel+0x6f/0x1f0 [ptlrpc]
[19625.124866]  [<ffffffffa0656a3a>] ldlm_cli_cancel_local+0xca/0x3f0 [ptlrpc]
[19625.124887]  [<ffffffffa065c767>] ldlm_cli_cancel+0x157/0x620 [ptlrpc]
[19625.124917]  [<ffffffffa08a8b1a>] osc_ldlm_blocking_ast+0x17a/0x3a0 [osc]
[19625.124949]  [<ffffffffa0668835>] ldlm_handle_bl_callback+0xf5/0x4f0 [ptlrpc]
[19625.124977]  [<ffffffffa06693e8>] ldlm_bl_thread_main+0x7b8/0x980 [ptlrpc]
[19625.125040]  [<ffffffff810b8254>] kthread+0xe4/0xf0
[19625.125053]  [<ffffffff817e0df7>] ret_from_fork_nospec_end+0x0/0x39
[19625.125063]  [<ffffffffffffffff>] 0xffffffffffffffff
[19625.125067] Kernel panic - not syncing: LBUG

and the oud 8347 backtrace is

 #4 [ffff88003e313820] vt_console_print at ffffffff814dbe54
 #5 [ffff88003e313880] call_console_drivers.constprop.17 at ffffffff8108cf00
 #6 [ffff88003e3138a8] console_unlock at ffffffff8108e559
 #7 [ffff88003e3138e8] vprintk_emit at ffffffff8108e984
 #8 [ffff88003e313958] vprintk_default at ffffffff8108ed79
 #9 [ffff88003e313968] printk at ffffffff817c67d1
#10 [ffff88003e3139c8] cfs_print_to_console at ffffffffa01f958a [libcfs]
#11 [ffff88003e3139f8] libcfs_debug_vmsg2 at ffffffffa01ff9e3 [libcfs]
#12 [ffff88003e313b48] libcfs_debug_msg at ffffffffa0200077 [libcfs]
#13 [ffff88003e313ba8] lbug_with_loc at ffffffffa01f9866 [libcfs]
#14 [ffff88003e313bc8] ldlm_lock_put at ffffffffa0638266 [ptlrpc]
#15 [ffff88003e313be8] osc_ldlm_glimpse_ast at ffffffffa08a8f28 [osc]
#16 [ffff88003e313ca0] ldlm_callback_handler at ffffffffa066a0a8 [ptlrpc]
#17 [ffff88003e313d18] ldlm_callback_handler at ffffffffa066b3c7 [ptlrpc]
#18 [ffff88003e313d30] ptlrpc_server_handle_request at ffffffffa0699266 [ptlrpc]
#19 [ffff88003e313dd0] ptlrpc_main at ffffffffa069d261 [ptlrpc]
#20 [ffff88003e313ea8] kthread at ffffffff810b8254

Issue Links

• is related to: LU-13908 ldlm_lock_put()) ASSERTION( (((( lock))->l_flags & (1ULL << 50)) != 0) ) failed
• is related to: LU-11670 Incorrect size when using lockahead