Xen devel - May 2005 - RE: possible changes was Re: [PATCH] make domu_debug run-time option + fix int3 handling for MP

> I can chunk this into 3 or 4 patches and make enabling 
> domu_debug a separate DOM0 operation. Would this be more palatable?
Why do we need a new domain flag for this?
 
What behaviour does the flag modify? 

Apologies if I''ve missed some earlier discussion.

Thanks,
Ian

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On 16 May 2005, at 21:18, Kip Macy wrote:
> This is a continuation of the discussion that we had when the initial 
> debug
> support went in. At the time Christian and you thought that it would 
> be ideal if
> domu_debug were a domain-build / run-time option, as opposed to a xen
> compile-time option. For the sake of expediency I didn''t do it at
the
> time. This
> patch was intended to rectify that.
>
> Having it perpetually as a compile-time option seems like making a 
> ptrace a
> compile-time option in Linux that defaulted to off.
If we deal with the int3 demux problem then I''m happy to make 
''domu_debug'' always on. Making it a per-domain config
build-time option
is not the tasteful solution imo.

  -- Keir


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On Mon, 16 May 2005, Ian Pratt wrote:
> 
> > I can chunk this into 3 or 4 patches and make enabling 
> > domu_debug a separate DOM0 operation. Would this be more palatable?
> 
> Why do we need a new domain flag for this?
>  
> What behaviour does the flag modify? 
> 
> Apologies if I''ve missed some earlier discussion.
> 
This is a continuation of the discussion that we had when the initial debug 
support went in. At the time Christian and you thought that it would be ideal if
domu_debug were a domain-build / run-time option, as opposed to a xen 
compile-time option. For the sake of expediency I didn''t do it at the
time. This
patch was intended to rectify that. 

Having it perpetually as a compile-time option seems like making a ptrace a
compile-time option in Linux that defaulted to off.


				-Kip



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> 
> Why do we need a new domain flag for this?
This is equivalent to the per-process flag that is set in UN*X to indicate that 
a process is being ptraced.


				-Kip

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