Stefan Hajnoczi <stefanha@xxxxxxxxxx> writes: > The Big QEMU Lock (BQL) has many names and they are confusing. The > actual QemuMutex variable is called qemu_global_mutex but it's commonly > referred to as the BQL in discussions and some code comments. The > locking APIs, however, are called qemu_mutex_lock_iothread() and > qemu_mutex_unlock_iothread(). > > The "iothread" name is historic and comes from when the main thread was > split into into KVM vcpu threads and the "iothread" (now called the main > loop thread). I have contributed to the confusion myself by introducing > a separate --object iothread, a separate concept unrelated to the BQL. > > The "iothread" name is no longer appropriate for the BQL. Rename the > locking APIs to: > - void qemu_bql_lock(void) > - void qemu_bql_unlock(void) > - bool qemu_bql_locked(void) > > There are more APIs with "iothread" in their names. Subsequent patches > will rename them. There are also comments and documentation that will be > updated in later patches. > > Signed-off-by: Stefan Hajnoczi <stefanha@xxxxxxxxxx> Acked-by: Fabiano Rosas <farosas@xxxxxxx>
