Re: Serial ATA (SATA) for Linux status report

From: Martin Schlemmer <azarah@nosferatu.za.org>
To: Jeff Garzik <jgarzik@pobox.com>
Cc: James Courtier-Dutton <James@superbug.demon.co.uk>,
	andersen@codepoet.org, Greg Stark <gsstark@mit.edu>,
	Linux Kernel Mailing Lists <linux-kernel@vger.kernel.org>,
	linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org,
	mplayer@jburgess.uklinux.net
Subject: Re: Serial ATA (SATA) for Linux status report
Date: Sun, 18 Jan 2004 14:34:36 +0200	[thread overview]
Message-ID: <1074429276.8472.194.camel@nosferatu.lan> (raw)
In-Reply-To: <4005E1D4.6040807@pobox.com>

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On Thu, 2004-01-15 at 02:41, Jeff Garzik wrote:
> I'm pretty sure the "excessive interrupts" issue was successfully 
> tracked down by Jon Burgess (thanks!).  He found this post describing an 
> ICH5 hardware issue,
> http://www.mail-archive.com/freebsd-stable@freebsd.org/msg58421.html
> 
> and he also submitted the attached patch.
> 
> I've been meaning to rewrite his patch to isolate it more to ata_piix, 
> but in the meantime maybe folks could test this?
> 

I have an Asus P4C800-E Deluxe, with two drivers on the ICH5 sata
controllers.  It is a 3Ghz cpu using HT.

I use the normal PIIX ide drivers for the pata channels, and libata for
the sata ones.  I also use the vector based interrupts.  Kernel is
2.6.1-bk4.

Anyhow, I do not think  the interrupt count is _that_ high, as it shares
with usb and network and I cannot complain of problems with cdrom, etc,
but I decided to try the patch anyhow.  It have some interesting results
though.  First, network stops responding after a few minutes of uptime
(especially easy to reproduce if you have heavy network traffic), then
for some reason you cannot start a new program/login/etc, but those
running seems Ok, and lastly X becomes totally unresponsive (although
alt-sysrq-b still do work).

--
 # cat /proc/interrupts
           CPU0       CPU1
  0:   29703539   29690292    IO-APIC-edge  timer
  2:          0          0          XT-PIC  cascade
  8:          2          0    IO-APIC-edge  rtc
  9:          0          0   IO-APIC-level  acpi
 14:        564        210    IO-APIC-edge  ide0
 15:          1          0    IO-APIC-edge  ide1
169:    1049180    1055746   IO-APIC-level  libata, uhci_hcd, eth0
177:      39519      37904   IO-APIC-level  Intel ICH5
185:    2521873    2494269   IO-APIC-level  uhci_hcd, uhci_hcd, nvidia
193:          0          0   IO-APIC-level  uhci_hcd
201:          0          0   IO-APIC-level  ehci_hcd
NMI:          0          0
LOC:   59387583   59387287
ERR:          0
MIS:          0
--

-- 
Martin Schlemmer

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