c097a60b10
If rcu_(un)register_thread() is called together with synchronize_rcu(), it will wait for the synchronize_rcu() to finish. But when synchronize_rcu() waits for some events, we can modify the list registry. We also use the lock rcu_gp_lock to assume that synchronize_rcu() isn't executed in more than one thread at the same time. Add a new mutex lock rcu_sync_lock to assume it and rename rcu_gp_lock to rcu_registry_lock. Release rcu_registry_lock when synchronize_rcu() waits for some events. Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Message-Id: <55B59652.4090503@cn.fujitsu.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Read the documentation in qemu-doc.html or on http://wiki.qemu-project.org - QEMU team