linux-kernel - RE: 2.6.23.1 - sata_mv (7042) hang with large file operations

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Message-ID: <BD261180E6D35F4D9D32F3E44FD3D9010AAE9007@EMPBEDEX.empirix.com>
Date:	Thu, 15 Nov 2007 10:43:24 -0500
From:	"Morrison, Tom" <tmorrison@...irix.com>
To:	"Mark Lord" <liml@....ca>
Cc:	"Jeff Garzik" <jeff@...zik.org>, <linux-ide@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: RE: 2.6.23.1 - sata_mv (7042) hang with large file operations

I have a console - and have booted with 

	"pci=nomsi" and the behavior is 
	~the same or even a little worse 
	in some case (but not by much)...

I will send kernel log & the .config file separately to you...
(quite long)...

Further, you should note that my arch/ppc does NOT have MSI
Capability (CONFIG_PCI_MSI) - thus I think this might be

Is there any debugging I can turn on in the proc or sysfs?
that might give more clues (e.g.: /proc/sys/dev/scsi/logging_level)?

t






-----Original Message-----
From: Mark Lord [mailto:liml@....ca] 
Sent: Wednesday, November 14, 2007 5:30 PM
To: Morrison, Tom
Cc: Jeff Garzik; linux-ide@...r.kernel.org; linux-kernel@...r.kernel.org
Subject: Re: 2.6.23.1 - sata_mv (7042) hang with large file operations

Morrison, Tom wrote:
> I have gotten it to boot from those hard-drives and it 
> has the same behavior:
> 
>   	Copying a large file to the same partition (>150MEG) 
>   	causes the system to hang (no I/O - no input/output - 
>   	nothing - complete freeze - like a primary resource 
>   	is locked up or interrupts got completely & totally 
>   	turned off in an ISR and its pending for something?
> 
> Only way to get out of this is to power-cycle the box!
..

Okay, a couple of things:

Do this from a text console, not a GUI.
And preferably without ever starting klogd/syslogd during init.

That way you've a much better chance of seeing some kernel diagnostic
messages when it locks up.

Can you boot with "nomsi" kernel parameter?
And I guess we'll need to see the entire kernel .config as well.

This is a tricky one.  The driver behaves fine for me
here with a 7042 rev.2 on PCIe in my x86-32 box.

Cheers
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