core file not generated when kernel is crashed with Sysrq key

core file not generated when kernel is crashed with Sysrq key

[dipankar das]

Hi,
core file is not generated when kernel is crashed with
Sysrq key ?

 What could be the reason for this ?

  Br,
   Dipankar.
 


		
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Re: core file not generated when kernel is crashed with Sysrq key

[Erik Mouw]

On Thu, Jul 28, 2005 at 04:52:42AM -0700, dipankar das wrote:
> core file is not generated when kernel is crashed with
> Sysrq key ?

That's right.

>  What could be the reason for this ?

Because it wasn't designed to do so. Core files are for crashing
userland programs. There are projects for kernel crash dumps, search
the archives.


Erik

-- 
+-- Erik Mouw -- www.harddisk-recovery.com -- +31 70 370 12 90 --
| Lab address: Delftechpark 26, 2628 XH, Delft, The Netherlands

Re: core file not generated when kernel is crashed with Sysrq key

[linux-os (Dick Johnson)]

On Thu, 28 Jul 2005, dipankar das wrote:

> Hi,
> core file is not generated when kernel is crashed with
> Sysrq key ?
>
> What could be the reason for this ?
>
>  Br,
>   Dipankar.

It's not supposed to write any 'core' file. A 'core' file is
a dump of users' virtual memory. It has nothing to do with
the kernel.

Cheers,
Dick Johnson
Penguin : Linux version 2.6.12 on an i686 machine (5537.79 BogoMips).
Warning : 98.36% of all statistics are fiction.
.
I apologize for the following. I tried to kill it with the above dot :

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Re: core file not generated when kernel is crashed with Sysrq key

[Vivek Goyal]

On Thu, Jul 28, 2005 at 04:52:42AM -0700, dipankar das wrote:
> Hi,
> core file is not generated when kernel is crashed with
> Sysrq key ?
> 

Do you mean that /proc/vmcore is not present once you are booted into 
capture kernel after crash? If yes, have you enabled the support for
/proc/vmcore in capture kernel (CONFIG_PROC_VMCORE)?

Thanks
Vivek