Re: [Fastboot] [PATCH] Kdump(x86): add note type NT_KDUMPINFO tokernel core dumps

[Andrew Morton]

Vivek Goyal <vgoyal@xxxxxxxxxx> wrote:
>
> > - Why do you avoid storing the current task on the other cpus?
>  > 
>  > - Can't we derive the current task from the existing register information
>  >   already captured.  
> 
>  It can be done but as Dave suggested but that requires significant amount 
>  of job to be done as one has to traverse through the active task stacks and
>  look for crash_kexec(). An easier/simpler way is that kernel itself can 
>  report it.  Netdump, diskdump already do it. I think for simplicity, it 
>  makes sense to export this information from kernel in the form of note.
> 
>  Only issue I could think of is stack overflow and current might be 
>  corrupted after panic.
> 

Yes, traversing the task_structs in a crashed kernel sounds like a poor
idea.

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