Re: Printing huge information on serial console causes panic ?

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Hi Yogeshwar,

It looks like that the excessive writing to the serial console caused the NMI watchdog to trigger a crash your kernel.

The NMI watch dog is explained here:

http://lxr.linux.no/linux/Documentation/nmi_watchdog.txt

I advise you to either to send less output to the console or find a different method of debugging.

Regards,
-- Mark


On Jun 23, 2008, at 12:44 AM, yogeshwar sonawane wrote:

Hello all,
as per mark's suggestion, i am attaching kernel dump.

Expecting a positive input,
-Yogeshwar

On Fri, Jun 20, 2008 at 7:36 PM, Mark Brown <markb@xxxxxxxxxxxxxxxxxxxxx > wrote:
Hi Yogeshwar,

You should provide the Kernel dump.

-- Mark

On Jun 20, 2008, at 7:58 AM, yogeshwar sonawane wrote:

Hello all,

I am writing a driver, in which i am using printk() at many places.
Now if I use this driver with serial console redirection enabled, then
this heavy printing causes kernel to panic. If the same driver is
loaded without serial console redirection enabled, the kernel does not
panic. All those messages comes on the terminal.
The machine is working. This is just my observation.

Now, how to understand this behaviour OR what is the reason behind this ?

I am using RHEL4-U4-x86_64 OS on 64-bit platform.
I can provide the panic messages which comes on the serial console.

TIA,
regards,
Yogeshwar

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