On Thu, Oct 16, 2014 at 02:26:18PM +0200, Mathieu Desnoyers wrote: > > + bool "Direct Access support" > > + depends on MMU > > + help > > + Direct Access (DAX) can be used on memory-backed block devices. > > + If the block device supports DAX and the filesystem supports DAX, > > + then you can avoid using the pagecache to buffer I/Os. Turning > > + on this option will compile in support for DAX; you will need to > > + mount the filesystem using the -o xip option. > > There is a mismatch between the documentation file (earlier patch): -o > dax, and this config description: -o xip. Whoops! Good catch. > I guess we might want to switch the mount option to "-o dax" and > document it as such, and since it should be usable transparently for the > same use-cases "-o xip" was enabling, we might want to keep parsing of > "-o xip" in the code for backward compatibility. > > Thoughts ? That's exactly what we do for ext2. For ext4, we force people to use the new -o dax option. We stop documenting that -o xip exist, and we print a message to tell people to switch over to -o dax. -- 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>