Re: 2.7 block ramblings (was Re: DMA for ide-scsi?)

Jeff Garzik
2003-09-20T18:28:53Z

Jens Axboe wrote:
> On Tue, Sep 16 2003, Jeff Garzik wrote:

>>And we should deprecate them with a solution that aligns what with Linus
>>described in Dec 2001 on lkml: a chrdev where userland write(2)s cdbs
>>and taskfiles, and read(2)s the results. This is where my thinking
>>picked up: if we are creating a chrdev to send "packets" and receive
>>responses to those packets............ <insert conclusion here>
>
>
> == bsg, block sg. Did you read what I wrote? :). I started implementing
> this and have something that barely works. You just bind a block device
> to a /dev/sg* char device and use read/write on that. Aka sg.

sg needs some modifications -- for example it errors out instead of
sleeps on queue full -- but sounds good to me.

> I don't want ioctls command submission interfaces more than you do.

Groovy.

Jeff