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cpus: tcg: unregister thread with RCU, fix exiting of loop on unplug 

Keep running until cpu_can_run(cpu) becomes false, for consistency
with other acceslerators.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2018-01-30 11:05:06 -05:00
parent d2831ab065
commit 9b0605f983
1 changed files with 7 additions and 7 deletions
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14
cpus.c
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@ -1467,6 +1467,7 @@ static void *qemu_tcg_rr_cpu_thread_fn(void *arg)
deal_with_unplugged_cpus(); deal_with_unplugged_cpus();
} }
rcu_unregister_thread();
return NULL; return NULL;
} }
@ -1603,18 +1604,17 @@ static void *qemu_tcg_cpu_thread_fn(void *arg)
/* Ignore everything else? */ /* Ignore everything else? */
break; break;
} }
} else if (cpu->unplug) {
qemu_tcg_destroy_vcpu(cpu);
cpu->created = false;
qemu_cond_signal(&qemu_cpu_cond);
qemu_mutex_unlock_iothread();
return NULL;
} }
atomic_mb_set(&cpu->exit_request, 0); atomic_mb_set(&cpu->exit_request, 0);
qemu_wait_io_event(cpu); qemu_wait_io_event(cpu);
} } while (!cpu->unplug || cpu_can_run(cpu));
qemu_tcg_destroy_vcpu(cpu);
cpu->created = false;
qemu_cond_signal(&qemu_cpu_cond);
qemu_mutex_unlock_iothread();
rcu_unregister_thread();
return NULL; return NULL;
} }