Am 10.12.2018 um 13:14 hat Denis Plotnikov geschrieben:
> >> @@ -491,9 +506,17 @@ int64_t aio_compute_timeout(AioContext *ctx);
> >> */
> >> static inline void aio_disable_external(AioContext *ctx)
> >> {
> >> + aio_context_acquire(ctx);
> >> atomic_inc(&ctx->external_disable_cnt);
> >> + aio_context_release(ctx);
> >> }
> >
> > This acquire/release pair looks rather useless?
>
> I'm not sure that I understand everything correctly...
> but can a thread (context) try to disable external in another context?
Yes, that can happen. For example, think of bdrv_drain_all().
Kevin
