From: Robert Hancock <hancockr@shaw.ca>
To: Matthew Fredrickson <creslin@digium.com>,
linux-kernel <linux-kernel@vger.kernel.org>
Cc: Tejun Heo <htejun@gmail.com>
Subject: Re: High CPU usage with sata_nv
Date: Tue, 20 Feb 2007 21:43:36 -0600 [thread overview]
Message-ID: <45DBBFE8.5080901@shaw.ca> (raw)
In-Reply-To: <fa.PMqnzxUBiShkWV4h9SiztNIwYc0@ifi.uio.no>
Matthew Fredrickson wrote:
> I have noticed something that might be related as well. I am working on
> a device driver that would have periodic data errors due to
> exceptionally long interrupt handling latency. I have come to the point
> that I suspect that it's the sata_nv driver, and now that we can't do
> the hdparm -u1 option for sata, it seems to be a bigger problem.
What kernel are you using? There were some complaints about latency
problems (the ATA status register read taking a ridiculous amount of
time to complete) on sata_nv previously, but 2.6.20 should eliminate
that problem at least on nForce4 chipsets..
--
Robert Hancock Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@nospamshaw.ca
Home Page: http://www.roberthancock.com/
next parent reply other threads:[~2007-02-21 3:43 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <fa.1OWRIIUBXsZOXflsGLA+7d4YCc0@ifi.uio.no>
[not found] ` <fa.A0XBTh7eCfsh11d3AhMO71/4xQU@ifi.uio.no>
[not found] ` <fa.fCm35VohC2wt9vlkg94Ru7me4ic@ifi.uio.no>
[not found] ` <fa.qDqCne4pXntL0PolSS2j8t4py3g@ifi.uio.no>
[not found] ` <fa.8TboLRab6f7zzIWFr/JPM6q04Zo@ifi.uio.no>
[not found] ` <fa.PMqnzxUBiShkWV4h9SiztNIwYc0@ifi.uio.no>
2007-02-21 3:43 ` Robert Hancock [this message]
2007-02-21 15:28 ` High CPU usage with sata_nv Matthew Fredrickson
2007-02-21 18:04 ` Lee Revell
2007-02-22 2:34 ` Robert Hancock
[not found] <20070115164541.M22367@elsat.net.pl>
2007-01-15 16:54 ` ris
2007-01-15 18:26 ` Frederik Deweerdt
2007-01-15 22:28 ` ris
2007-01-22 3:40 ` Tejun Heo
2007-02-11 22:31 ` ris
2007-02-12 6:49 ` Tejun Heo
2007-02-12 14:11 ` ris
2007-02-12 16:18 ` Tejun Heo
2007-02-12 20:02 ` Matthew Fredrickson
2007-02-12 20:09 ` Tejun Heo
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