linux-kernel - Re: What happen when hangs !!

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Date:	Thu, 07 Dec 2006 14:00:42 +0100
From:	Michal Schmidt <xschmi00@...d.feec.vutbr.cz>
To:	Jaswinder Singh <jaswinderrajput@...il.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: What happen when hangs !!

Jaswinder Singh wrote:
> Sometimes my machine hangs in userspace area like this :-
> 
> VFS: Mounted root (ext3 filesystem).
> Freeing init memory: 124K
> INIT:
> <<HANGS>>
> 
> OR
> 
> VFS: Mounted root (ext3 filesystem).
> Freeing init memory: 124K
> INIT: version 2.85 booting
> <<RUNNING SMOOTHLY>>
> 
> How can I debug this hang, what are the cases.

When it hangs, try to capture the list of processes using Alt+SysRq+T. 
You need to have CONFIG_MAGIC_SYSRQ enabled in the kernel.

Michal
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