On Sun, Aug 23, 2009 at 04:40:51PM +0300, Avi Kivity wrote: > On 08/23/2009 04:36 PM, Michael S. Tsirkin wrote: >> More important here is realization that eventfd is a mutex/semaphore >> implementation, not a generic event reporting interface as we are trying >> to use it. >> > > Well it is a generic event reporting interface (for example, aio uses it).
Davide, I think it's a valid point. For example, what read on eventfd does (zero a counter and return) is not like any semaphore I saw. Look at eventfd as pipe replacement: for wake-up between processes, it works well. But what if we want to pass around some kind of key as well? pipe lets you pass single-byte values atomically. This flag allows us to use 8 byte values as keys. > -- > error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
