svn commit: r201139 - in head/sys: cam/ata geom sys

[Bruce Simpson]

On 28/12/2009 20:08, Alexander Motin wrote:
> Author: mav
> Date: Mon Dec 28 20:08:01 2009
> New Revision: 201139
> URL: http://svn.freebsd.org/changeset/base/201139
>
> Log:
>    Add BIO_DELETE support to ada(4):
>    - For SSDs use TRIM feature of DATA SET MANAGEMENT command, as defined by
>    ACS-2 specification working draft.
>    - For CompactFlash use CFA ERASE command, same as ad(4) does.
>    

A thought popped into my head as I read this.
Is anyone implementing these ATA commands, intended for CF and SSD 
devices, in e.g. VirtualBox, QEMU?
They could probably help out with block allocation for copy-on-write 
disk images there.

Just a thought.

cheers,
BMS