Re: driver concurrency

[Justin Cormack <justin%specialbusservice.com@localhost>]

On Mon, Dec 1, 2014 at 7:42 PM, Manuel Bouyer <bouyer%antioche.eu.org@localhost> wrote:
> On Mon, Dec 01, 2014 at 02:28:04PM -0500, Thor Lancelot Simon wrote:
>> They would, and many are simple enough to make this reasonably easy to do,
>> but in practice, the giant locking of our SCSI code makes it pointless.
>
> Sure, but we could also make the scsi code run without the giant lock.
> Also, some of them don't use the scsi layer, but present a ld(4)
> interface (although is seems that most recent onces present a scsi interface).

NVMexpress is a new non-SCSI storage standard with per CPU queues. I
was planning to port the FreeBSD driver when the hardware becomes a
bit more available.

Justin