Hugh Dickins <hughd@xxxxxxxxxx> writes: > I've not been entirely convinced that tmpfs needs direct_IO either; > but your links from back then show a number of people who feel that > direct_IO had become mainstream enough to deserve the appearance of > support by tmpfs. One other thing that occurs to me is that, if we fake O_DIRECT, then io_submit will block until the I/O is complete. It shouldn't block for long, sure, but it will still block. I can't say I'm happy about that, given that many applications mix aio+dio, and will now run into some odd behaviour when run against tmpfs. Cheers, Jeff -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>