CloudLinux running inside KVM kernel error?

[Miktash]

Hi,

We have a cloudlinux system running plesk installed as a VM on proxmox, running inside KVM.
Now, we got this kernel error recently (see below) and we wonder what could be the cause of this?

The VM is configured with a 2 sockets 6 cores CPU, the host has 2x L5460 CPU's.
16GB of ram allocated.
CPU type = host
numa enabled

The error received after running for only 3 hours:

[ 8608.711786] Modules linked in: unix_diag udp_diag inet_diag ip6table_nat nf_nat_ipv6 xt_nat xt_multiport xt_set ip_set_hash_net ip_set nfnetlink kcare(OE) iptable_nat nf_nat_ipv4 nf_nat ip6table_mangle ip6t_REJECT nf_reject_ipv6 nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables iptable_mangle ipt_REJECT binfmt_misc nf_reject_ipv4 nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack libcrc32c kmodlve(O) vzdev iptable_filter dm_mirror dm_region_hash dm_log dm_mod ppdev crc32_pclmul ghash_clmulni_intel sg bochs_drm ttm parport_pc parport drm_kms_helper aesni_intel lrw gf128mul glue_helper ablk_helper cryptd drm joydev i2c_piix4 virtio_balloon i2c_core shpchp pcspkr ip_tables ext4 mbcache jbd2 sr_mod cdrom ata_generic pata_acpi virtio_net virtio_console virtio_blk crct10dif_pclmul crct10dif_common

[ 8608.711850] crc32c_intel floppy ata_piix serio_raw libata virtio_pci virtio_ring virtio

[ 8608.711867] CPU: 3 PID: 71745 Comm: lvectl ve: 0 Kdump: loaded Tainted: G OE ------------ 3.10.0-962.3.2.lve1.5.25.10.el7.x86_64 #1 61.16

[ 8608.711871] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.11.2-0-gf9626ccb91-prebuilt.qemu-project.org 04/01/2014

[ 8608.711874] task: ffff8faf36b9b420 ti: ffff8faf9482c000 task.ti: ffff8faf9482c000

[ 8608.711877] RIP: 0010:[<ffffffff8cb66df5>] [<ffffffff8cb66df5>] copy_page_rep+0x5/0x10

[ 8608.711886] RSP: 0000:ffff8faf9482fd60 EFLAGS: 00010286

[ 8608.711893] RAX: 0000000000000200 RBX: ffff8fb000000055 RCX: 0000000000000200

[ 8608.711896] RDX: ffff8fb137cde040 RSI: ffff8fb32ff00000 RDI: ffff8faf20a00000

[ 8608.711899] RBP: ffff8faf9482fdd8 R08: 0000000000000001 R09: ffffe7c050bfc01c

[ 8608.711902] R10: 0000000000000200 R11: ffffe7c040828000 R12: ffff8faf9482fd58

[ 8608.711904] R13: 000011abd313633f R14: ffff8faf9482fd98 R15: ffff8fb0c23675e0

[ 8608.711908] FS: 00007fe350c20740(0000) GS:ffff8fb137cc0000(0000) knlGS:0000000000000000

[ 8608.711910] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

[ 8608.711913] CR2: 00007fe345ba5050 CR3: 00000000949fc000 CR4: 00000000000207e0

[ 8608.711920] Call Trace:

[ 8608.711927] [<ffffffff8c9dff41>] ? handle_pte_fault+0x5e1/0xce0

[ 8608.711939] [<ffffffff8c9e2607>] handle_mm_fault+0x397/0x9a0

[ 8608.711951] [<ffffffff8cf355d7>] __do_page_fault+0x197/0x4f0

[ 8608.711959] [<ffffffff8cf35a16>] trace_do_page_fault+0x56/0x150

[ 8608.711965] [<ffffffff8cf34fa2>] do_async_page_fault+0x22/0xf0

[ 8608.711973] [<ffffffff8cf31798>] async_page_fault+0x28/0x30

[ 8608.711982] Code: ff ff ff ff c3 90 9c fa 65 48 3b 06 75 14 65 48 3b 56 08 75 0d 65 48 89 1e 65 48 89 4e 08 9d b0 01 c3 9d 30 c0 c3 b9 00 02 00 00 <f3> 48 a5 c3 0f 1f 80 00 00 00 00 eb ee 66 66 66 90 66 66 66 90

 

[wolfgang]

Hi,

this look like a memory problem.
Check your memory but I think it is a Cloud Linux kernel problem.

 

[sb-jw]

We using CloudLinux and Plesk too, and do not have such problems. Did you tried to update all your software? What PVE version you running?

 

[Miktash]

Turned out to be an apache process taking lots of memory in a matter of seconds. After fixing that issue this kernel message never appeared again.