[LU-16099] BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:35

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Severity: 3
• Assignee: Artem Blagodarenko
• Reporter: Artem Blagodarenko

Description

In my local environment:

[root@centos82 lustre-wc-2]# cat createobj.sh 
#!/bin/bash
for (( a = 1; a < 100; a++ )) do
 dd if=/dev/urandom of=/mnt/lustre/$a bs=4096 count=1000
done
 

gives a lot of such messages in dmesg:

[ 1056.906584] CPU: 4 PID: 10370 Comm: ldlm_bl_04 Tainted: G        W  OE    --------- -  - 4.18.0-372.9.1.rt7.166.el8.x86_64+debug #1
[ 1056.906618] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
[ 1056.906619] Call Trace:
[ 1056.906623]  dump_stack+0x5c/0x80
[ 1056.906629]  ___might_sleep.cold.96+0xf5/0x109
[ 1056.906634]  rt_spin_lock+0x3d/0xd0
[ 1056.906638]  ? cfs_trace_lock_tcd+0x23/0x80 [libcfs]
[ 1056.906652]  cfs_trace_lock_tcd+0x23/0x80 [libcfs]
[ 1056.906665]  libcfs_debug_msg+0x127/0xc90 [libcfs]
[ 1056.906678]  ? lock_acquire+0x14f/0x470
[ 1056.906682]  ? __switch_to_asm+0x35/0x70
[ 1056.906684]  ? lock_acquire+0x14f/0x470
[ 1056.906688]  ? lock_release+0x1ca/0x450
[ 1056.906691]  ? _raw_spin_unlock_irqrestore+0x3c/0x80
[ 1056.906695]  ? rt_mutex_slowunlock+0x22e/0x2f0
[ 1056.906699]  ? ldlm_bl_get_work+0x21d/0x2e0 [ptlrpc]
[ 1056.906813]  ldlm_bl_get_work+0x21d/0x2e0 [ptlrpc]
[ 1056.906916]  ldlm_bl_thread_main+0x563/0x960 [ptlrpc]
[ 1056.907023]  ? finish_wait+0x80/0x80
[ 1056.907026]  ? ldlm_handle_bl_callback+0x3f0/0x3f0 [ptlrpc]
[ 1056.907149]  kthread+0x165/0x180
[ 1056.907153]  ? set_kthread_struct+0x40/0x40
[ 1056.907157]  ret_from_fork+0x3a/0x50
[ 1057.930481] BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:35
[ 1057.930484] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 9205, name: ldlm_bl_01
[ 1057.930486] INFO: lockdep is turned off.
[ 1057.930487] Preemption disabled at:
[ 1057.930488] [<ffffffffc08067f5>] libcfs_debug_msg+0xf5/0xc90 [libcfs]