On Wed, Oct 08, 2014 at 03:05:23PM -0400, Matthew Wilcox wrote: > > One of the things on my todo list is making O_DIRECT work to a > memory-mapped direct_access file. I don't understand the motivation or the use case: O_DIRECT is purely for bypassing the page cache, and DAX already bypasses the page cache. What difference is there between the DAX read/write path and a DAX-based O_DIRECT IO path, and why doesn't just ignoring O_DIRECT for DAX enabled filesystems simply do what you need? Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- 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
