Re: 5.14.9 aarch64 OOPS Workqueue: btrfs-delalloc btrfs_work_helper

[Su Yue <l@damenly.su>]

On Thu 21 Oct 2021 at 08:37, Qu Wenruo <quwenruo.btrfs@gmx.com> 
wrote:

> On 2021/10/21 08:29, Su Yue wrote:
>>
>> On Wed 20 Oct 2021 at 19:55, Chris Murphy 
>> <lists@colorremedies.com> wrote:
>>
>>> On Tue, Oct 19, 2021 at 9:10 PM Su Yue <l@damenly.su> wrote:
>>>>
>>>> Dump file and vmlinu[zx] kernel file are needed.
>>>
>>> So we get a splat but kdump doesn't create a vmcore. Do we 
>>> need to
>>> issue sysrq+c at the time of the hang and splat to create it?
>>>
>> Yes, please.
>>
>> BTW, I ran xfstests with 5.14.10-300.fc35.aarch64 and
>> 5.14.12-200.fc34.aarch64 in several rounds. No panic/hang 
>> found,
>> so I think we can exclude the possibility of the toolchain.
>
> Or this can also mean, fstests is not enough to trigger it?
>
Right...Can't deny the possibility without any evidence for now.

--
Su
> Thanks,
> Qu
>
>>
>> --
>> Su
>>
>>> Fedora Linux 35 (Cloud Edition)
>>> Kernel 5.14.10-300.fc35.aarch64 on an aarch64 (ttyAMA0)
>>>
>>> eth0: 199.204.45.141 2604:e100:1:0:f816:3eff:fe72:c876
>>> dusty-35 login: [  286.982605] Unable to handle kernel paging 
>>> request
>>> at virtual address fffffffffffffdd0
>>> [  286.988338] Mem abort info:
>>> [  286.990307]   ESR = 0x96000004
>>> [  286.992596]   EC = 0x25: DABT (current EL), IL = 32 bits
>>> [  286.996316]   SET = 0, FnV = 0
>>> [  286.998454]   EA = 0, S1PTW = 0
>>> [  287.000791]   FSC = 0x04: level 0 translation fault
>>> [  287.004472] Data abort info:
>>> [  287.006540]   ISV = 0, ISS = 0x00000004
>>> [  287.009239]   CM = 0, WnR = 0
>>> [  287.011344] swapper pgtable: 4k pages, 48-bit VAs,
>>> pgdp=0000000054181000
>>> [  287.018245] [fffffffffffffdd0] pgd=0000000000000000,
>>> p4d=0000000000000000
>>> [  287.024209] Internal error: Oops: 96000004 [#1] SMP
>>> [  287.027615] Modules linked in: virtio_gpu virtio_dma_buf
>>> drm_kms_helper cec joydev fb_sys_fops syscopyarea virtio_net
>>> sysfillrect sysimgblt net_failover virtio_balloon failover 
>>> vfat fat
>>> drm fuse zram ip_tables crct10dif_ce ghash_ce virtio_blk 
>>> qemu_fw_cfg
>>> virtio_mmio aes_neon_bs
>>> [  287.047659] CPU: 0 PID: 3558 Comm: kworker/u8:7 Kdump: 
>>> loaded Not
>>> tainted 5.14.10-300.fc35.aarch64 #1
>>> [  287.055269] Hardware name: QEMU KVM Virtual Machine, BIOS 
>>> 0.0.0
>>> 02/06/2015
>>> [  287.060932] Workqueue: btrfs-delalloc btrfs_work_helper
>>> [  287.065353] pstate: 80400005 (Nzcv daif +PAN -UAO -TCO 
>>> BTYPE=--)
>>> [  287.070568] pc : submit_compressed_extents+0x38/0x3d0
>>> [  287.074825] lr : async_cow_submit+0x50/0xd0
>>> [  287.078217] sp : ffff800015d4bc20
>>> [  287.081008] x29: ffff800015d4bc30 x28: 0000000000000000 
>>> x27:
>>> ffffb8a2fa941000
>>> [  287.087022] x26: fffffffffffffdd0 x25: dead000000000100 
>>> x24:
>>> ffff000115873608
>>> [  287.092822] x23: 0000000000000000 x22: 0000000000000001 
>>> x21:
>>> ffff0000c6f25800
>>> [  287.098591] x20: ffff0000c0596000 x19: 0000000000000001 
>>> x18:
>>> ffff0000c2100bd4
>>> [  287.104387] x17: ffff000115875ff8 x16: 0000000000000006 
>>> x15:
>>> 50006a3d10a961cd
>>> [  287.110159] x14: f0668b836620caa1 x13: 0000000000000020 
>>> x12:
>>> ffff0001fefa68c0
>>> [  287.116170] x11: ffffb8a2fa95b500 x10: 0000000000000000 x9 
>>> :
>>> ffffb8a2f9131c40
>>> [  287.122120] x8 : ffff475f045bb000 x7 : ffff800015d4bbe0 x6 
>>> :
>>> ffffb8a2fae8ad40
>>> [  287.128086] x5 : 0000000000000000 x4 : 0000000000000000 x3 
>>> :
>>> ffff0000c6f25820
>>> [  287.133953] x2 : 0000000000000000 x1 : ffff000115873630 x0 
>>> :
>>> ffff000115873630
>>> [  287.139760] Call trace:
>>> [  287.141784]  submit_compressed_extents+0x38/0x3d0
>>> [  287.145620]  async_cow_submit+0x50/0xd0
>>> [  287.148801]  run_ordered_work+0xc8/0x280
>>> [  287.152005]  btrfs_work_helper+0x98/0x250
>>> [  287.155450]  process_one_work+0x1f0/0x4ac
>>> [  287.161577]  worker_thread+0x188/0x504
>>> [  287.167461]  kthread+0x110/0x114
>>> [  287.172872]  ret_from_fork+0x10/0x18
>>> [  287.178558] Code: a9056bf9 f8428437 f9401400 d108c2fa 
>>> (f9400356)
>>> [  287.186268] ---[ end trace 41ec405ced3786b6 ]---