Re: [discuss] Re: kgdb for x86_64 2.6 kernels

[George Anzinger <george@mvista.com>]

Matt Mackall wrote:
> On Tue, Jan 13, 2004 at 01:26:46PM -0800, George Anzinger wrote:
> 
>>>Serial interface should be configurable independent of kgdb and may not be 
>>>configured if ethernet interface is configured.  Serial interface is far 
>>>simpler hence superior for debugging purposes. If it's available, using 
>>>ethernet interface is out of question. Ethernet interface can be used when 
>>>serial hardware isn't present or is being used for some other purposes.
>>>
>>
>>I rather think that the serial inteface should be the fall back unless the 
>>user has told us at configure time that it is not available.  I am not 
>>prepared to make a statment that it is better than eth.  The eth intface 
>>should be much faster, but it has its fingers into a large part of the 
>>kernel that MAY be the subject of the current session.  Thus, I think that 
>>eth may be better, IF one is clearly not involved in debugging those areas 
>>of the kernel.  (Which, by the way, we need to enumerate at some point.)
> 
> 
> I have in mind creating some other interfaces that will be on a par
> with serial for early boot availability. So lets not frame this in
> terms of eth vs serial. We can throw a priority int in the config
> interface, stuff that in the plug struct, and pick whichever one's
> highest and claims to be currently available.
> 
Right.  I had hoped that we might one day be able to use the USB and I am sure 
there are others.


-- 
George Anzinger   george@mvista.com
High-res-timers:  http://sourceforge.net/projects/high-res-timers/
Preemption patch: http://www.kernel.org/pub/linux/kernel/people/rml