KVM freeze when host is under IO load

Discussion in 'Proxmox VE: Installation and configuration' started by Softer, Dec 8, 2018 at 15:40.

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  1. Softer

    Softer New Member

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    Hi, all. Please help with the problem ...

    ProxMox 5.3, when the disk is under high IO (backup, recovery or just dd), KVM machines become completely frozen (network, cpu). I read the links below, but these recipes did not help. I tried to use 4.13 kernel, but with no luck... Is there any solution to this problem?

    Local disks are used, no LVM, ext4 file system.

    bugzilla.kernel.org/show_bug.cgi?id=199727
    bugzilla.proxmox.com/show_bug.cgi?id=1453
    forum.proxmox.com/threads/kvm-guests-freeze-hung-tasks-during-backup-restore-migrate.34362/
    forum.proxmox.com/threads/frequent-cpu-stalls-in-kvm-guests-during-high-io-on-host.30702/
    (Sorry, I can't post likns :( )

    Versions:
    Code:
    # pveversion -v
    proxmox-ve: 5.3-1 (running kernel: 4.15.18-9-pve)
    pve-manager: 5.3-5 (running version: 5.3-5/97ae681d)
    pve-kernel-4.15: 5.2-12
    pve-kernel-4.13: 5.2-2
    pve-kernel-4.15.18-9-pve: 4.15.18-30
    pve-kernel-4.15.18-1-pve: 4.15.18-19
    pve-kernel-4.13.16-4-pve: 4.13.16-51
    pve-kernel-4.13.13-6-pve: 4.13.13-42
    pve-kernel-4.4.44-1-pve: 4.4.44-84
    pve-kernel-4.4.10-1-pve: 4.4.10-54
    pve-kernel-4.4.8-1-pve: 4.4.8-52
    corosync: 2.4.4-pve1
    criu: 2.11.1-1~bpo90
    glusterfs-client: 3.8.8-1
    ksm-control-daemon: 1.2-2
    libjs-extjs: 6.0.1-2
    libpve-access-control: 5.1-3
    libpve-apiclient-perl: 2.0-5
    libpve-common-perl: 5.0-43
    libpve-guest-common-perl: 2.0-18
    libpve-http-server-perl: 2.0-11
    libpve-storage-perl: 5.0-33
    libqb0: 1.0.3-1~bpo9
    lvm2: 2.02.168-pve6
    lxc-pve: 3.0.2+pve1-5
    lxcfs: 3.0.2-2
    novnc-pve: 1.0.0-2
    openvswitch-switch: 2.7.0-3
    proxmox-widget-toolkit: 1.0-22
    pve-cluster: 5.0-31
    pve-container: 2.0-31
    pve-docs: 5.3-1
    pve-edk2-firmware: 1.20181023-1
    pve-firewall: 3.0-16
    pve-firmware: 2.0-6
    pve-ha-manager: 2.0-5
    pve-i18n: 1.0-9
    pve-libspice-server1: 0.14.1-1
    pve-qemu-kvm: 2.12.1-1
    pve-xtermjs: 1.0-5
    qemu-server: 5.0-43
    smartmontools: 6.5+svn4324-1
    spiceterm: 3.0-5
    vncterm: 1.5-3
     
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