Host kernel: 6.1.33-1-lts (Arch) Guest kernel: 6.4-rc6 defconfig QEMU: 8.0.2 (Arch) CPU: AMD EPYC 74F3

1242 iterations :

  [    0.015088] printk: console [ttyS0] enabled
  [    0.055882] ACPI: Core revision 20230331
  [    0.056124] APIC: Switch to symmetric I/O mode setup
  [    0.056867] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x2e204823bcd,   max_idle_ns: 440795224253 ns
  [    0.057467] Calibrating delay loop (skipped) preset value.. 6399.99 BogoMIPS (lpj=3199998)
  [    0.057924] pid_max: default: 32768 minimum: 301
  [    0.058194] LSM: initializing lsm=capability,integrity
  [    0.058464] Mount-cache hash table entries: 4096 (order: 3, 32768 bytes, linear)
  [    0.058464] Mountpoint-cache hash table entries: 4096 (order: 3, 32768 bytes, linear)
  [    0.058464] x86/cpu: User Mode Instruction Prevention (UMIP) activated
  [    0.058464] Last level iTLB entries: 4KB 512, 2MB 255, 4MB 127
  [    0.058464] Last level dTLB entries: 4KB 512, 2MB 255, 4MB 127, 1GB 0
  [    0.058464] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
  [    0.058464] Spectre V2 : Mitigation: Retpolines
  [    0.058464] Spectre V2 : Spectre v2 / SpectreRSB mitigation: Filling RSB on context switch
  [    0.058464] Spectre V2 : Spectre v2 / SpectreRSB : Filling RSB on VMEXIT
  [    0.058464] Spectre V2 : Enabling Restricted Speculation for firmware calls
  [    0.058464] Spectre V2 : mitigation: Enabling conditional Indirect Branch Prediction Barrier
  [    0.058464] Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl
  [    0.058464] Freeing SMP alternatives memory: 48K
  *** ERROR OR HANG ***

After reverting commit f31dcb152a3d0816e2f1deab4e64572336da197d :

40000 iterations (4 runs) = "test ok"