On Mon, Oct 18, 2021 at 05:05:50PM +0200, Christoph Hellwig wrote: > On Mon, Oct 18, 2021 at 04:19:20PM +0200, Lennart Poettering wrote: > > A brief answer like "yes, please, enable by default" would already > > make me happy. > > I thikn enabling it by default is a good idea. The only good use > case I can think of for using buffered I/O is when the image has > a smaller block size than supported on the host file. Maybe we can enable it at default in kernel side, then fackback to buffered IO if DIO is failed. thanks, Ming