linux-kernel - Re: [2.6.9] NMI watchdog detected lockup.

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Message-ID: <20090319133753.GB5507@cathedrallabs.org>
Date:	Thu, 19 Mar 2009 09:37:53 -0400
From:	Aristeu Rozanski <aris@...vo.org>
To:	Pawe? Sikora <pluto@...k.net>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [2.6.9] NMI watchdog detected lockup.

Hi Pawel,
> we're currently testing trial version of Jungo pci driver for
> linux/windows
> (http://www.jungo.com/st/windriver_usb_pci_driver_development_software.html)
> and get 'NMI Watchdog detected LOCKUP' on athlon64/opteron smp systems
> with rhel 2.6.9 kernel. from the other side, the lockup doesn't occur
> on intel x86_64 smp systems. bad news is that Jungo developers can't
> reproduce
> the lockup while we can trig it during simple pci bus scanning/opening
> device.
>
> only diagnostic we have is console log grabbed over rs232 link.
first: 2.6.9 is an old kernel, so I suppose you're using a vendor
kernel.
second: I can't see any obvious link to download the source code for
that driver. we can't help you with binary modules, contact both the kernel
vendor and the driver vendor.

> NMI Watchdog detected LOCKUP, CPU=0, registers:
something (probably the Jungo driver) is using too much time and the NMI
watchdog is not being reset often enough. try booting with nmi_watchdog=0
kernel parameter and check if the driver works. if the machine hangs, it means
that the NMI watchdog was right and the CPU was really stuck because of a bug.
contact your vendors and inform the results.

-- 
Aristeu

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