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Date: Wed, 15 Mar 2006 18:14:26 -0500
From: "Bill Rugolsky Jr." <brugolsky@telemetry-investments.com>
To: Jeff Garzik <jeff@garzik.org>
Cc: Ingo Molnar <mingo@elte.hu>, Andi Kleen <ak@suse.de>,
       Lee Revell <rlrevell@joe-job.com>, Jason Baron <jbaron@redhat.com>,
       linux-kernel@vger.kernel.org, john stultz <johnstul@us.ibm.com>
Subject: Re: libata/sata_nv latency on NVIDIA CK804 [was Re: AMD64 X2 lost ticks on PM timer]
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On Wed, Mar 15, 2006 at 05:50:37PM -0500, Jeff Garzik wrote:
> Alas, it is far from that simple :(
> 
> The code I linked to isn't in a working state.  NV contributed it 
> largely as "it worked at one time" documentation of a 
> previously-undocumented register interface.
> 
> Someone needs to debug it.

Errrr, guess that would me me.  Looks like a few interfaces have changed.
I'll put some time in to see whether I can get it to compile and boot.
If it's just a sata_nv issue, the easier solution is to buy a 3ware or
Areca card ... but I'll take a shot at anyway.

[Meanwhile, I still have to switch contexts and look at the long softirq
latencies that at first glance appear to be due to the use of mempool
by the RAID1 bio code.]

	-Bill