On Mon, Feb 24, 2020 at 01:48:48PM +0000, Damien Le Moal wrote: > > The main problem with allowing IOCB_NOWAIT is that for an application that sends > multiple write AIOs with a single io_submit(), all write AIOs after one that is > failed with -EAGAIN will be failed with -EINVAL (not -EIO !) since they will > have an unaligned write offset. I am wondering if that is really a problem at > all since the application can catch the -EAGAIN and -EINVAL, indicating that the > write stream was stopped. So maybe it is reasonable to simply allow IOCB_NOWAIT ? I don't think supporting IOCB_NOWAIT with current zonefs is very useful. It will be very useful once Zone Append is supported. But more importantly my patch fixes a bug in the current zonefs implementation. We need to fix that before 5.6 is released. Any additional functionaity can still come later if we think that it is useful.
