linux-kernel - Re: [RFC][PATCH 1/1] cxgb3i: cxgb3 iSCSI initiator

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Message-Id: <200808111645.04677.divy@chelsio.com>
Date:	Mon, 11 Aug 2008 16:45:03 -0700
From:	Divy Le Ray <divy@...lsio.com>
To:	"Steve Wise" <swise@...ngridcomputing.com>
Cc:	"David Miller" <davem@...emloft.net>, rdreier@...co.com,
	jgarzik@...ox.com, "Karen Xie" <kxie@...lsio.com>,
	netdev@...r.kernel.org, open-iscsi@...glegroups.com,
	michaelc@...wisc.edu, daisyc@...ibm.com, wenxiong@...ibm.com,
	bhua@...ibm.com, "Dimitrios Michailidis" <dm@...lsio.com>,
	"Casey Leedom" <leedom@...lsio.com>, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH 1/1] cxgb3i: cxgb3 iSCSI initiator

On Monday 11 August 2008 04:20:07 pm Steve Wise wrote:
> David Miller wrote:
> > From: Roland Dreier <rdreier@...co.com>
> > Date: Mon, 11 Aug 2008 09:09:02 -0700
> >
> >>  > We turn it off.  If I want to shape or filter one of these iSCSI
> >>  > connections can we turn it off?
> >>
> >> That seems like a reasonable idea to me -- the standard thing to do when
> >> a NIC offload conflicts with something else is to turn off the offload
> >> and fall back to software.
> >
> > But as Herbert says, we can make LRO such that turning it off
> > isn't necessary.
> >
> > Can we shape the iSCSI offload traffic without turning it off?
>
> With Chelsio's product you can do this.  Maybe Divy can provide details?

The T3 adapter is capable of performing rate control and pacing based on RTT 
on a per-connection basis.

Cheers,
Divy
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