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Date: Sat, 20 Sep 2003 14:28:37 -0400
From: Jeff Garzik <jgarzik@pobox.com>
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To: Jens Axboe <axboe@suse.de>
CC: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       torvalds@osdl.org, Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: 2.7 block ramblings (was Re: DMA for ide-scsi?)
References: <200309131101.h8DB1WNd021570@harpo.it.uu.se> <1063476275.8702.35.camel@dhcp23.swansea.linux.org.uk> <20030913184934.GB10047@gtf.org> <20030913190131.GD10047@gtf.org> <20030915073445.GC27105@suse.de> <20030916194955.GC5987@gtf.org> <20030916195515.GC906@suse.de>
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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



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