Leon Fauster
2020-May-11 13:59 UTC
[CentOS] kvm: C8 as guest on C6 host / huge delay while booting
Since C8.1 kvm guests have a huge delay while booting on a kvm host based on C6. This delay was not present with C8.0. The "pause" happend direct after the grub step. The VNC session shows only a "_" character. Any ideas what changes? -- Leon
Leon Fauster
2020-May-16 15:09 UTC
[CentOS] kvm: C8 as guest on C6 host / huge delay while booting
Am 11.05.20 um 15:59 schrieb Leon Fauster:> Since C8.1? kvm guests have a huge delay while booting on a kvm host > based on C6. This delay was not present with C8.0. The "pause" happend > direct after the grub step. The VNC session shows only a "_" character. >and this are the corresponding logs. The guest system continues to boot after ~5 minutes. At that point this appears May 16 16:44:14 ev kernel: kvm: 8458: cpu0 unhandled rdmsr: 0x140 May 16 16:44:14 ev kernel: kvm: 8458: cpu0 disabled perfctr wrmsr: 0xc2 data 0xffff May 16 16:44:14 ev kernel: kvm: 8458: cpu1 unhandled rdmsr: 0x140 May 16 16:44:14 ev kernel: kvm: 8458: cpu2 unhandled rdmsr: 0x140 May 16 16:44:14 ev kernel: kvm: 8458: cpu3 unhandled rdmsr: 0x140 May 16 16:44:15 ev kernel: kvm: emulating exchange as write Any ideas? -- Leon
Strahil Nikolov
2020-May-16 15:28 UTC
[CentOS] kvm: C8 as guest on C6 host / huge delay while booting
On May 16, 2020 6:09:22 PM GMT+03:00, Leon Fauster via CentOS <centos at centos.org> wrote:>Am 11.05.20 um 15:59 schrieb Leon Fauster: >> Since C8.1? kvm guests have a huge delay while booting on a kvm host >> based on C6. This delay was not present with C8.0. The "pause" >happend >> direct after the grub step. The VNC session shows only a "_" >character. >> > >and this are the corresponding logs. The guest system continues to boot > >after ~5 minutes. At that point this appears > >May 16 16:44:14 ev kernel: kvm: 8458: cpu0 unhandled rdmsr: 0x140 >May 16 16:44:14 ev kernel: kvm: 8458: cpu0 disabled perfctr wrmsr: 0xc2 > >data 0xffff >May 16 16:44:14 ev kernel: kvm: 8458: cpu1 unhandled rdmsr: 0x140 >May 16 16:44:14 ev kernel: kvm: 8458: cpu2 unhandled rdmsr: 0x140 >May 16 16:44:14 ev kernel: kvm: 8458: cpu3 unhandled rdmsr: 0x140 >May 16 16:44:15 ev kernel: kvm: emulating exchange as write > >Any ideas? > >-- >Leon >_______________________________________________ >CentOS mailing list >CentOS at centos.org >https://lists.centos.org/mailman/listinfo/centosWhat is the output of: systemd-analyze blame systemd-analyze critical-chain systemd-analyze plot > somefile Best Regards, Strahil Nikolov
Kay Diederichs
2020-May-16 15:48 UTC
[CentOS] kvm: C8 as guest on C6 host / huge delay while booting
On 5/16/20 5:09 PM, Leon Fauster via CentOS wrote:> Am 11.05.20 um 15:59 schrieb Leon Fauster: >> Since C8.1? kvm guests have a huge delay while booting on a kvm host based on C6. This delay was not present with C8.0. The "pause" happend >> direct after the grub step. The VNC session shows only a "_" character. >> > > and this are the corresponding logs. The guest system continues to boot after ~5 minutes. At that point this appears > > May 16 16:44:14 ev kernel: kvm: 8458: cpu0 unhandled rdmsr: 0x140 > May 16 16:44:14 ev kernel: kvm: 8458: cpu0 disabled perfctr wrmsr: 0xc2 data 0xffff > May 16 16:44:14 ev kernel: kvm: 8458: cpu1 unhandled rdmsr: 0x140 > May 16 16:44:14 ev kernel: kvm: 8458: cpu2 unhandled rdmsr: 0x140 > May 16 16:44:14 ev kernel: kvm: 8458: cpu3 unhandled rdmsr: 0x140 > May 16 16:44:15 ev kernel: kvm: emulating exchange as write > > Any ideas? > > -- > Leon > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centoslooks like a mismatch between the hardware that the KVM guest is told to use, and the actual hardware provided by the host. You can change the CPU type that the guest expects. HTH Kay