[Bug 216388] On Host, kernel errors in KVM, on guests, it shows CPU stalls

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=216388

--- Comment #11 from Robert Dinse (nanook@eskimo.com) ---
Well still happening with gcc-12.2.0 but seems to be somewhat less frequent.

[    7.092312] rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: {
4-... } 3 jiffies s: 389 root: 0x10/.
[    7.092329] rcu: blocking rcu_node structures (internal RCU debug):
[    7.092332] Task dump for CPU 4:
[    7.092334] task:modprobe        state:R  running task     stack:    0 pid:
1502 ppid:     8 flags:0x0000400a
[    7.092338] Call Trace:
[    7.092344]  <TASK>
[    7.092347]  ? __wake_up_common_lock+0x87/0xc0
[    7.092355]  ? sysvec_apic_timer_interrupt+0x90/0xa0
[    7.092361]  ? insn_get_prefixes+0x1f1/0x440
[    7.092365]  ? load_new_mm_cr3+0x7f/0xe0
[    7.092368]  ? cpumask_any_but+0x35/0x50
[    7.092372]  ? x2apic_send_IPI_allbutself+0x2f/0x40
[    7.092375]  ? do_sync_core+0x2a/0x30
[    7.092379]  ? cpumask_next+0x23/0x30
[    7.092381]  ? smp_call_function_many_cond+0xea/0x370
[    7.092386]  ? text_poke_memset+0x20/0x20
[    7.092389]  ? arch_unregister_cpu+0x50/0x50
[    7.092394]  ? __fscache_acquire_cookie+0x4f4/0x500 [fscache]
[    7.092407]  ? on_each_cpu_cond_mask+0x1d/0x30
[    7.092409]  ? text_poke_bp_batch+0xaf/0x210
[    7.092412]  ? __traceiter_fscache_volume+0x60/0x60 [fscache]
[    7.092421]  ? __fscache_acquire_cookie+0x4f4/0x500 [fscache]
[    7.092429]  ? __fscache_acquire_cookie+0x4f4/0x500 [fscache]
[    7.092438]  ? text_poke_bp+0x49/0x70
[    7.092440]  ? __static_call_transform+0x7f/0x120
[    7.092442]  ? arch_static_call_transform+0x87/0xa0
[    7.092446]  ? __static_call_init+0x167/0x210
[    7.092450]  ? static_call_module_notify+0x13e/0x1a0
[    7.092452]  ? blocking_notifier_call_chain_robust+0x72/0xd0
[    7.092456]  ? load_module+0x2068/0x25e0
[    7.092459]  ? ima_post_read_file+0xd5/0x100
[    7.092464]  ? __do_sys_finit_module+0xbd/0x130
[    7.092466]  ? __do_sys_finit_module+0xbd/0x130
[    7.092469]  ? __x64_sys_finit_module+0x18/0x20
[    7.092470]  ? do_syscall_64+0x5b/0x80
[    7.092474]  ? ksys_mmap_pgoff+0x108/0x250
[    7.092478]  ? do_syscall_64+0x67/0x80
[    7.092480]  ? exit_to_user_mode_prepare+0x41/0x1e0
[    7.092485]  ? syscall_exit_to_user_mode+0x1b/0x40
[    7.092487]  ? do_syscall_64+0x67/0x80
[    7.092489]  ? do_syscall_64+0x67/0x80
[    7.092492]  ? entry_SYSCALL_64_after_hwframe+0x63/0xcd
[    7.092496]  </TASK>

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