On Tue, Jan 09, 2018 at 11:16:16PM +0100, Arnd Bergmann wrote: > Hmm, these two new syscall entry points turn into four when we add in > support for 64-bit time_t, as we'd have to support all combinations of 32/64 > bit aio_context_t and time_t. At least they'll also replace plain old io_getevents :) > Would it be better to start this interface out by defining it using a 64-bit > timeout structure? The downside would be that the user space syscall > wrappers have to start out with a conversion, if we don't do it, then > the opposite conversion would have to get added later. Which structure do you want? In the end applications using libaio or even the syscalls directly (like seastar) are a special bread, so they could probably just deal with whatever structure we want to pass.