Hi Kyle.
On Wed, Jul 25, 2007 at 11:43:38PM -0400, Kyle Moffett ([email protected]) wrote:
> If you made all your sockets and inter-thread pipes nonblocking then
> in userspace you would just epoll_wait() on the sockets and pipes and
> be easily able to react to any IO from anywhere.
>
> In kernel space there are similar nonblocking interfaces, although it
> would probably be easier just to use a couple threads.
There are no such interfaces in kernel - one must create own state
machine on top of ->poll() callback, or use sys_poll()/epoll, but likely
it is not what one wants for high-performance in-kernel event processing
engine. Having two threads does not solve the problem - eventually one
needs to send a header before receiving data. So, the solution would
either to use always-blocking mode like in NBD, or create own state
machine using ->poll() callbacks.
> Cheers,
> Kyle Moffett
--
Evgeniy Polyakov
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