XCP-ng 8.0 Kernel Error

[mvogt]

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 ]---

[olivierlambert]

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

[mvogt]

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?

[olivierlambert]

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.