[Pkg-zfsonlinux-devel] Bug#1100048: zfs-dkms: kworker fails on remove_vm_area and freezes system

[Shengqi Chen]

Control: tags -1 + moreinfo

Hi,

> Mar 09 21:25:15 sonic kernel: <TASK>
> Mar 09 21:25:15 sonic kernel: ? __die_body.cold+0x1a/0x1f
> Mar 09 21:25:15 sonic kernel: ? page_fault_oops+0xd2/0x2b0
> Mar 09 21:25:15 sonic kernel: ? srso_alias_return_thunk+0x5/0x7f
> Mar 09 21:25:15 sonic kernel: ? search_bpf_extables+0x5b/0x80
> Mar 09 21:25:15 sonic kernel: ? exc_page_fault+0xca/0x170
> Mar 09 21:25:15 sonic kernel: ? asm_exc_page_fault+0x22/0x30
> Mar 09 21:25:15 sonic kernel: ? __vunmap_range_noflush+0x211/0x470
> Mar 09 21:25:15 sonic kernel: ? psi_group_change+0x152/0x370
> Mar 09 21:25:15 sonic kernel: remove_vm_area+0x91/0xb0
> Mar 09 21:25:15 sonic kernel: __vunmap+0xb8/0x340
> Mar 09 21:25:15 sonic kernel: free_work+0x21/0x30
> Mar 09 21:25:15 sonic kernel: process_one_work+0x1c4/0x380
> Mar 09 21:25:15 sonic kernel: worker_thread+0x4d/0x380
> Mar 09 21:25:15 sonic kernel: ? rescuer_thread+0x3a0/0x3a0
> Mar 09 21:25:15 sonic kernel: kthread+0xd7/0x100
> Mar 09 21:25:15 sonic kernel: ? kthread_complete_and_exit+0x20/0x20
> Mar 09 21:25:15 sonic kernel: ret_from_fork+0x1f/0x30
> Mar 09 21:25:15 sonic kernel: </TASK>

This stack does not seem to be directly related to zfs, but a normal
page free routine. Maybe you can do some comparison (e.g. with or w/o
zfs module installed) and see if this could be consistently reproduced.

Thanks,
Shengqi Chen