XCP-ng 8.0 Kernel Error



  • Hi,

    i get following Error in my XCP-ng Server (patched up-to-date).

    It is a Pool of 8 Systems with shared NFS Storages.

    It happened on different Hosts in the Pool. It seems it happens only when snapshots are running, but not every time.

    In top you see:

    PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
    24093 root 20 0 67612 3856 184 R 100.0 0.0 3897:08 forkexecd

    System is responsible via SSH, but not XOA / XCP-ng Center or xe commands in shell.
    VMs are still running.

    Has anyone seen this before?

    ERROR:

    [358511.080241] CPU: 5 PID: 8336 Comm: kworker/5:2 Tainted: G        W  O      4.19.0+1 #1
    [358511.080242] Hardware name: Supermicro PIO-618U-T4T+-ST031/X10DRU-i+, BIOS 3.2 06/11/2019
    [358511.080256] Workqueue:            (null) (mm_percpu_wq)
    [358511.080259] RIP: e030:xen_mc_flush+0x18e/0x1a0
    [358511.080261] Code: 00 41 3b 5d 08 72 da 41 c7 45 08 00 00 00 00 4c 89 e7 e8 75 15 00 00 66 90 85 ed 75 0d 5b 5d 41 5c 41 5d 41 5e 41 5f c3 0f 0b <0f> 0b eb ef 0f 0b 66 90 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00
    [358511.080261] RSP: e02b:ffffc900463f3d18 EFLAGS: 00010002
    [358511.080263] RAX: ffffffff81019190 RBX: 0000000000000001 RCX: 0000000000000007
    [358511.080264] RDX: ffff888296554b90 RSI: 0000000080000000 RDI: 0000000000000002
    [358511.080265] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
    [358511.080265] R10: 00000000ffffffea R11: 0000000000000000 R12: 0000000000000002
    [358511.080266] R13: ffff888296554180 R14: 0000000000000001 R15: 0000000000000030
    [358511.080277] FS:  00007fa4670e6ac0(0000) GS:ffff888296540000(0000) knlGS:0000000000000000
    [358511.080278] CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
    [358511.080279] CR2: 00000000000000b0 CR3: 000000005969e000 CR4: 0000000000040660
    [358511.080285] Call Trace:
    [358511.080286] ---[ end trace fc81ef41554ca934 ]---
    

  • XCP-ng Team

    1. Check partition used space (df -h)
    2. Restart XAPI
    3. Try 8.1 beta to see if it's better


  • Hi,
    thanks for replying.

    1. not full
      [16:50 XEN90 ~]# df -h
      Filesystem Size Used Avail Use% Mounted on
      devtmpfs 3.9G 76K 3.9G 1% /dev
      tmpfs 3.9G 752K 3.9G 1% /dev/shm
      tmpfs 3.9G 11M 3.9G 1% /run
      tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
      /dev/sda1 18G 1.7G 16G 10% /
      xenstore 3.9G 0 3.9G 0% /var/lib/xenstored
      /dev/sda5 3.9G 709M 3.0G 20% /var/log

    2. xe-toolstack-restart does not run through

    3. is it stable enough for production use? Do you know when it is available as stable?


  • XCP-ng Team

    RC will be out this week (Wed. or Thursday). Mainly minor stuff before going to the release one.

    So I don't think you'll have issue with it.


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