Recovering Linux system from hung state via software

Arun KS getarunks at
Wed Dec 4 23:56:23 EST 2013

Hi Vipul,

On Fri, Nov 29, 2013 at 5:58 AM, Vipul Jain <vipulsj at> wrote:
> Hi Kernel alias,
> I am a newbie and I am trying to figure out ways where in I can recover the
> Linux in below two scenarios:
> 1. my specific process hangs.
> 2. kernel gets hung partially or completely.
> I have done some reading and seems like there is softlockup and hardlockup
> mechanisms in Linux source base that I can use but not sure, if yes I have
> below questions:
> 1. Which kernel version is minimum required for this?
> 2. How do I know that soft and hard lockup are enabled in my kernel?
> 3. How can I customize the behavior of default action that been taken?
> 4. Can I use these two lockup mechanism to find out if my process is hung
> or not?
> 5. Any pointers to any docs that can help will be appreciated.
> I will greatly appreciate any help here.

What about crashing the system using sysrq and analysing the ramdump
using crash utility?

May be  the following link give you some pointers,

> Regards,
> Vipul.
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