Milosz Tanski <milosz@xxxxxxxxx> writes: > I would like to talk about enhancing the user interfaces for doing > async buffered disk IO for userspace applications. There's a whole > class of distributed web applications (most new applications today) > that would benefit from such an API. Most of them today rely on > cobbling one together in user space using a threadpool. > > The current in kernel AIO interfaces that only support DIRECTIO, they > were generally designed by and for big database vendors. The consensus > is that the current AIO interfaces usually lead to decreased > performance for those app. > > I've been developing a new read syscall that allows non-blocking > diskio read (provided that data is in the page cache). It's analogous > to what exists today in the network world with recvmsg with MSG_NOWAIT > flag. The work has been previously described by LWN here: > https://lwn.net/Articles/612483/ > > Previous attempts (over the last 12+ years) at non-blocking buffered > diskio has stalled due to their complexity. I would like to talk about > the problem, my solution, and get feedback on the course of action. This email seems to conflate async I/O and non-blocking I/O. Could you please be more specific about what you're proposing to talk about? Is it just the non-blocking read support? Cheers, Jeff -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
