On Thu, 08/27 18:23, Stefan Hajnoczi wrote:
> On Wed, Jul 29, 2015 at 12:42:10PM +0800, Fam Zheng wrote:
> > +void aio_disable_enable_clients(AioContext *ctx, int clients_mask,
> > + bool is_disable)
> > +{
> > + AioHandler *node;
> > + aio_context_acquire(ctx);
> > +
> > + QLIST_FOREACH(node, &ctx->aio_handlers, node) {
> > + if (!node->deleted && node->type & clients_mask) {
> > + node->disable_cnt += is_disable ? 1 : -1;
> > + }
> > + }
> > + aio_context_release(ctx);
> > +}
>
> If someone adds an fd of a disabled type *after* the call to
> aio_disable_clients() then it won't be disabled.
>
> Another approach is to keep an array of counters per AioContext and
> check the counters during aio_poll() when deciding which fds to monitor.
Good idea, I'll change that way.
>
> Also, this function acquires/releases AioContext so it's worth
> mentioning in the doc comments that this function is thread-safe.
>
OK.
Fam
