On 10/15/2014 07:28 PM, Aneesh Kumar K.V wrote:
>
> =============================================
> [ INFO: possible recursive locking detected ]
> 3.17.0+ #31 Not tainted
> ---------------------------------------------
> qemu-system-ppc/9112 is trying to acquire lock:
> (&(&vcpu->arch.tbacct_lock)->rlock){......}, at: [<d000000011591f84>] .vcore_stolen_time+0x44/0xb0 [kvm_hv]
>
> but task is already holding lock:
> (&(&vcpu->arch.tbacct_lock)->rlock){......}, at: [<d000000011592524>] .kvmppc_remove_runnable.part.2+0x34/0xd0 [kvm_hv]
This must come from here:
while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE &&
(vc->vcore_state == VCORE_RUNNING ||
vc->vcore_state == VCORE_EXITING)) {
spin_unlock(&vc->lock);
kvmppc_wait_for_exec(vcpu, TASK_UNINTERRUPTIBLE);
spin_lock(&vc->lock);
}
if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) {
kvmppc_remove_runnable(vc, vcpu);
vcpu->stat.signal_exits++;
kvm_run->exit_reason = KVM_EXIT_INTR;
vcpu->arch.ret = -EINTR;
}
if vc->vcore_state is VCORE_SLEEPING (I think it cannot be VCORE_STARTING)?
Paolo
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