Issue
Such errors appear in the system log:
Aug 29 10:26:14 plesk-euc1-c53 kernel: systemd(1): moving task sudo(29140) outside of lve, mask 6
Aug 29 10:26:14 plesk-euc1-c53 kernel: CPU: 0 PID: 1 Comm: systemd ve: 0 Kdump: loaded Tainted: G O ------------ 3.10.0-962.3.2.lve1.5.70.el7.x86_64 #1 61.16
Aug 29 10:26:14 plesk-euc1-c53 kernel: Hardware name: Amazon EC2 c5.2xlarge/, BIOS 1.0 10/16/2017
Aug 29 10:26:14 plesk-euc1-c53 kernel: Call Trace:
Aug 29 10:26:14 plesk-euc1-c53 kernel: [<ffffffffaf329a97>] dump_stack+0x19/0x1b
Aug 29 10:26:14 plesk-euc1-c53 kernel: [<ffffffffc06095fb>] lve_cgroup_attach_task_trace+0xeb/0xf0 [kmodlve]
Aug 29 10:26:14 plesk-euc1-c53 kernel: [<ffffffffaed2fee0>] attach_task_by_pid+0x160/0x1a0
Aug 29 10:26:14 plesk-euc1-c53 kernel: [<ffffffffaed2ff36>] cgroup_procs_write+0x16/0x20
Aug 29 10:26:14 plesk-euc1-c53 kernel: [<ffffffffaed2edc9>] cgroup_file_write+0x159/0x310
Aug 29 10:26:14 plesk-euc1-c53 kernel: [<ffffffffaee41358>] ? __sb_start_write+0x58/0x110
Aug 29 10:26:14 plesk-euc1-c53 kernel: [<ffffffffaeefae07>] ? security_file_permission+0x27/0xa0
Aug 29 10:26:14 plesk-euc1-c53 kernel: [<ffffffffaee3e320>] vfs_write+0xc0/0x1f0
Aug 29 10:26:14 plesk-euc1-c53 kernel: [<ffffffffaee3f14f>] SyS_write+0x7f/0xf0
Aug 29 10:26:14 plesk-euc1-c53 kernel: [<ffffffffaf33b85b>] system_call_fastpath+0x22/0x27
Environment
- CloudLinux 7
- Kernel >= 3.10.0-962.3.2.lve1.5.26.4,
Cause
Expected behavior. Starting from 3.10.0-962.3.2.lve1.5.26.4, the kernel includes a patch (KMODLVE-255) that generates these messages in logs. This patch is expected to print a warning to the kernel log when a thread with an LVE tag attached is being moved to a different cgroup using non-LVE API. The message looks like "XXX: moving task YYY outside of lve" (with the call trace).
These warnings will be deprecated in one of the next kernel releases.
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