[PATCH 0/2][concept RFC] x86: BIOS-save kernel log to disk upon panic

H. Peter Anvin hpa at zytor.com
Thu Jan 27 11:12:45 EST 2011

On 01/27/2011 07:47 AM, Eric W. Biederman wrote:
>> Yes - but at least a long time ago there used to be modi of reboot when the BIOS did
>> not do this. Whether that's possible at all with modern BIOSen is a
>> big question ...
> As I recall that was how you went from 32bit mode to 16bit real mode.
> The issue is that mode never reset the hardware it simply changed the
> cpu mode.

Quite correct.  It doesn't just bypass the memory wipe, it bypasses the 
entire POST.


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