On 12. 01. 23, 7:07, Jiri Slaby wrote:
I have rebooted to a fresh kernel which 1) have lockdep enabled, and 2)
I have debuginfo for. So next time this happens, I can print held locks
For the time being:
> Showing all locks held in the system:
> 1 lock held by rcu_tasks_kthre/11:
> #0: ffffffffb097a550 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at:
rcu_tasks_one_gp+0x2b/0x3d0
> 1 lock held by rcu_tasks_rude_/12:
> #0: ffffffffb097a2d0 (rcu_tasks_rude.tasks_gp_mutex){+.+.}-{3:3},
at: rcu_tasks_one_gp+0x2b/0x3d0
> 1 lock held by rcu_tasks_trace/13:
> #0: ffffffffb097a010 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3},
at: rcu_tasks_one_gp+0x2b/0x3d0
> 1 lock held by in:imklog/1308:
> #0: ffff9538d81364e8 (&f->f_pos_lock){+.+.}-{3:3}, at:
__fdget_pos+0x4c/0x60
> 2 locks held by plasmashell/6865:
> #0: ffff95393f6092e8 (&f->f_pos_lock){+.+.}-{3:3}, at:
__fdget_pos+0x4c/0x60
> #1: ffff9538dc2aa458 (&mm->mmap_lock#2){++++}-{3:3}, at:
__access_remote_vm+0x4f/0x3c0
> 1 lock held by fuse mainloop/9772:
> #0: ffff953a578a7468 (&pipe->mutex/1){+.+.}-{3:3}, at:
splice_file_to_pipe+0x26/0xd0
> 1 lock held by fuse mainloop/9773:
> #0: ffff953a578a7e68 (&pipe->mutex/1){+.+.}-{3:3}, at:
splice_file_to_pipe+0x26/0xd0
> 1 lock held by fuse mainloop/25378:
> #0: ffff9538d3d8c868 (&pipe->mutex/1){+.+.}-{3:3}, at:
splice_file_to_pipe+0x26/0xd0
> 1 lock held by qemu-kvm/31097:
> 6 locks held by qemu-kvm/31098:
> #0: ffff953a062080b0 (&vcpu->mutex){+.+.}-{3:3}, at:
kvm_vcpu_ioctl+0x77/0x6d0 [kvm]
> #1: ffff9538c6e838e8 (&serio->lock){-.-.}-{2:2}, at:
serio_interrupt+0x24/0x90
> #2: ffff9538c6e80230 (&dev->event_lock){-.-.}-{2:2}, at:
input_event+0x3c/0x80
> #3: ffffffffb097af60 (rcu_read_lock){....}-{1:2}, at:
input_pass_values.part.0+0x5/0x270
> #4: ffffffffb097af60 (rcu_read_lock){....}-{1:2}, at:
__handle_sysrq+0x5/0xa0
> #5: ffffffffb097af60 (rcu_read_lock){....}-{1:2}, at:
debug_show_all_locks+0x15/0x16b
> 1 lock held by qemu-kvm/31099:
> 3 locks held by qemu-kvm/31100:
> 1 lock held by qemu-kvm/31819:
> #0: ffff9538dc2aa458 (&mm->mmap_lock#2){++++}-{3:3}, at:
__vm_munmap+0x95/0x170
> 1 lock held by qemu-kvm/31935:
> #0: ffff9538dc2aa458 (&mm->mmap_lock#2){++++}-{3:3}, at:
do_madvise.part.0+0xe8/0x2a0
> 1 lock held by dmesg/31873:
> #0: ffff9538ef6000d0 (&user->lock){+.+.}-{3:3}, at:
devkmsg_read+0x4b/0x230
> 1 lock held by ps/31996:
> #0: ffff9538dc2aa458 (&mm->mmap_lock#2){++++}-{3:3}, at:
__access_remote_vm+0x4f/0x3c0
and dump a kcore (kdump is set up).
Going to trigger a dump now.
--
js
suse labs
