On Mon, Jan 04, 2016 at 04:54:52PM +1100, Dave Chinner wrote: > From: Dave Chinner <dchinner@xxxxxxxxxx> > > Rather than just being able to turn DAX on and off via a mount > option, some applications may only want to enable DAX for certain > performance critical files in a filesystem. > > This patch introduces a new inode flag to enable DAX in the v3 inode > di_flags2 field. It adds support for setting and clearing flags in > the di_flags2 field via the XFS_IOC_FSSETXATTR ioctl, and sets the > S_DAX inode flag appropriately when it is seen. > > When this flag is set on a directory, it acts as an "inherit flag". > That is, inodes created in the directory will automatically inherit > the on-disk inode DAX flag, enabling administrators to set up > directory heirarchies that automatically use DAX. Setting this flag > on an empty root directory will make the entire filesystem use DAX > by default. > > Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx> Looks good to me. Reviewed-by: Theodore Ts'o <tytso@xxxxxxx> - Ted -- 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
