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graphic: 0.919
semantic: 0.853
socket: 0.844
device: 0.838
KVM: 0.833
mistranslation: 0.831
assembly: 0.828
other: 0.800
instruction: 0.783
boot: 0.757
vnc: 0.688
network: 0.635
migrating failed with rcu_preempt message on proxmox 8
Description of problem:
when i migrate the VM from one host to another, it fails and give messages:
```
[ 584.109502] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
[ 584.109534] rcu: 1-...!: (0 ticks this GP) idle=1408/0/0x0 softirq=8428/8428 fqs=0 (false positive?)
[ 584.109556] (detected by 0, t=5252 jiffies, g=2953, q=74 ncpus=2)
[ 584.109561] Sending NMI from CPU 0 to CPUs 1:
[ 584.109587] NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xb/0x10
[ 584.110564] rcu: rcu_preempt kthread timer wakeup didn't happen for 5251 jiffies! g2953 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
[ 584.110585] rcu: Possible timer handling issue on cpu=1 timer-softirq=8006
[ 584.110597] rcu: rcu_preempt kthread starved for 5252 jiffies! g2953 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
[ 584.110614] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
[ 584.110645] rcu: RCU grace-period kthread stack dump:
[ 584.110658] task:rcu_preempt state:I stack:0 pid:15 ppid:2 flags:0x00004000
[ 584.110667] Call Trace:
[ 584.110672] <TASK>
[ 584.110688] __schedule+0x351/0xa20
[ 584.110699] ? rcu_gp_cleanup+0x480/0x480
[ 584.110704] schedule+0x5d/0xe0
[ 584.110705] schedule_timeout+0x94/0x150
[ 584.110709] ? __bpf_trace_tick_stop+0x10/0x10
[ 584.110714] rcu_gp_fqs_loop+0x141/0x4c0
[ 584.110717] rcu_gp_kthread+0xd0/0x190
[ 584.110720] kthread+0xe9/0x110
[ 584.110725] ? kthread_complete_and_exit+0x20/0x20
[ 584.110728] ret_from_fork+0x22/0x30
[ 584.110735] </TASK>
[ 584.110736] rcu: Stack dump where RCU GP kthread last ran:
[ 584.110747] Sending NMI from CPU 0 to CPUs 1:
[ 584.110757] NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xb/0x10
```
we can reproduce on our R630 cluster easily, but it is OK on R730 cluster and R740 cluster.
Steps to reproduce:
1. create and run an VM
2. migrate the vm to other host
3. it failed with message
Additional information:
i downgrade the pve-qemu-kvm from 8.1.2-4 to 8.0.2-3, same problem.
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