RFC: ATA to CAM integration patch

[Alexander Motin]

Roman Divacky wrote:
> On Fri, Jun 26, 2009 at 09:47:26PM +0300, Alexander Motin wrote:
>> I would like to present for testing and feedback present state of my and
>> Scott work on extending CAM subsystem to support ATA in addition to
>> SCSI. At this moment we have:
> 
> this is awesome! do you plan to add support for the TRIM command support?
> what would it take to teach FreeBSD to use the TRIM?

I haven't looked on it yet, but I think should be really easy from disk 
driver point ov view. After last firmware update, my SSD should now 
support TRIM, so I will look on it closer, as time permit.

The main question is to implement BIO_DELETE in filesystems code. I have 
seen in lists that UFS patches were made long time ago, but they are 
still not committed. Now practically the only BIO_DELETE consumer is 
newfs with -E option, which I have successfully used with mmcsd driver.

-- 
Alexander Motin