LBA Range handling

[Matthew Wilcox]

On Wed, Nov 23, 2011 at 01:47:20PM -0800, Kong, Kwok wrote:
> Actually, I am not sure how do use the LBA range.  Who should set the
> LBA Range ? Should it be the driver or the application ?  What should
> the driver behave if the type is 'page cache', 'RAID', 'Reserved' or
> 'FILESYSTEM' ?
> 
> How are we supposed to use the LBA range ?

My understanding is that there will be a user-space application (like
fdisk) that will write the LBA Range Type attribute.  The 'type' is
mostly for the benefit of this application and shouldn't be interpreted
by the driver.