> > I kept on getting requests from application developers who want that > > feature. My initial patch was dated back May 2004. > > The right way to do it involves synchronization between the kernel side > io_getevents() and the userspace code pulling events out of the ring. > Alan Cox suggested embedding a futex in the shared memory region, but I > don't think anyone ever implemented that.
Yeah, I like the idea of futexes. I'm worried that virtual aliasing spells doom for the current home-brewed serialization that fs/aio.c is doing with the shared ring head/tail accesses. Am I worrying about nothing here? > > I will look into this aside from this patch. > > That's probably the case. Also, any changes in this area *must* correctly > update the compat/incompat feature flags in the ring buffer header. That > has been missed in the past... Do you know of anyone using the current ring info ABI? The *only* user I know of is the check of ctx->magic in libaio. - z - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
