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Date: Tue, 15 Mar 2005 06:44:11 -0700
From: Scott Long <scottl@samsco.org>
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To: Danny Braniss <danny@cs.huji.ac.il>
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Subject: Re: iSCSI initiator driver beta version, testers wanted
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Danny Braniss wrote:
> things are looking much better 2day, got tag queuing to work, and now it's 
> much faster.
> Q: how can the driver tell the cam to enable queing (ie: camcontrol tag 0:0:0 
> -Nn), and

case XPT_PATH_INQ:
	cpi->hba_inquiry = PI_TAG_ABLE

> Q: is there a rule of thumb as to how many tag'ed?

When you call cam_sim_alloc(), there are arguments for how many
concurrent tagged and untagged transactions the driver can handle.
I don't know how tags work in iscsi, so I can't say what a good
number is here.  Note that tag management is left completely up
to the driver; CAM will tell you whether or not to use a tag for
a particular CCB, but it's up to the driver to assign and track
the tag number.

> 
> thanks,
> 	danny
> PS: soon there will be a new beta, any news with the old one?
> 
> 

Sorry, I haven't had much time to review the old one yet.  Sounds like
you're making really good progress, though.

Scott