On Thu, 2015-08-20 at 11:00 +0800, Dongsheng Yang wrote: > On 08/20/2015 04:35 AM, Richard Weinberger wrote: > > Currently UBIFS does not support direct IO, but some applications > > blindly use the O_DIRECT flag. > > Instead of failing upon open() we can do better and fall back > > to buffered IO. > > Hmmmm, to be honest, I am not sure we have to do it as Dave > suggested. I think that's just a work-around for current fstests. > > IMHO, perform a buffered IO when user request direct IO without > any warning sounds not a good idea. Maybe adding a warning would > make it better. > > I think we need more discussion about AIO&DIO in ubifs, and actually > I have a plan for it. But I have not listed the all cons and pros of > it so far. > > Artem, what's your opinion? Yes, this is my worry too. Basically, we need to see what is the "common practice" here, and follow it. This requires a small research. What would be the most popular Linux FS which does not support direct I/O? Can we check what it does? Artem. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
