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From: Mark Lord <liml@rtr.ca>
To: Tejun Heo <htejun@gmail.com>, Jeff Garzik <jgarzik@pobox.com>,
	Alan Cox <alan@redhat.com>,
	IDE/ATA development list <linux-ide@vger.kernel.org>
Subject: Hard lockup with ata_piix 2.6.21.1: strange traceback, too
Date: Wed, 20 Jun 2007 17:12:13 -0400	[thread overview]
Message-ID: <4679982D.2030000@rtr.ca> (raw)

Hi guys,

I'm debugging a system here based on ICH7/ata_piix.
When we hot-pull a drive, it locks up solid.
That's fine, but I'd like to find/fix the lockup.

So as part of poking around, I rebuilt the kernel with frame pointers,
and inserted a WARN_ON(1) into ata_busy_sleep() to see who was calling it
just before things locked up. 

Here's the result:  http://rtr.ca/libata.png

Can anyone here make sense of that traceback??
Are we *really* recursing inside the EH code?

Thanks

             reply	other threads:[~2007-06-20 21:12 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-06-20 21:12 Mark Lord [this message]
2007-06-21  4:29 ` Hard lockup with ata_piix 2.6.21.1: strange traceback, too Tejun Heo

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