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

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

mvogt

Hi,
thanks for replying.

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
xe-toolstack-restart does not run through
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.