Avi Kivity wrote: > Anthony Liguori wrote: >> >> BTW, when we set O_ASYNC on the tap fd, we're eliminating >> O_NONBLOCK. This means that we have to poll loop select() when >> readv()'ing packets instead of just reading until hitting AGAIN. >> This means at least an extra syscall per packet. > > I didn't know that O_ASYNC and O_NONBLOCK were mutually exclusive. > Can you point me at the relevant documentation?
I don't know that they are, but we're doing an: fcntl(fd, F_SETFL, O_ASYNC); F_SETFL is not additive so the previous O_NONBLOCK gets dropped. Regards, Anthony Liguori ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
