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unlock iothread mutex before running kvm ioctl

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Without this, kvm will hold the mutex while it issues its run ioctl,
and never be able to step out of it, causing a deadlock.

Patchworks-ID: 35359
Signed-off-by: Glauber Costa <glommer@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Glauber Costa 2009-10-07 16:38:03 -03:00 • committed by Anthony Liguori
parent ce88f890bd
commit d549db5a73
3 changed files with 9 additions and 4 deletions
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2
kvm-all.c
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@ -605,7 +605,9 @@ int kvm_cpu_exec(CPUState *env)
}
kvm_arch_pre_run(env, run);
qemu_mutex_unlock_iothread();
ret = kvm_vcpu_ioctl(env, KVM_RUN, 0);
qemu_mutex_lock_iothread();
kvm_arch_post_run(env, run);
if (ret == -EINTR || ret == -EAGAIN) {