Re: [Xen-devel] [PATCH v2 COLOPre 09/13] tools/libxl: Update libxl_save_msgs_gen.pl to support return data from xl to xc

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Wen Congyang writes ("Re: [Xen-devel] [PATCH v2 COLOPre 09/13] tools/libxl: 
Update libxl_save_msgs_gen.pl to support return data from xl to xc"):
> On 06/16/2015 06:49 PM, Ian Campbell wrote:
> > Can you be more specific about what kind of data you need to pass back
> > here? Is it an opaque "void *" blob or is it potentially more
> > structured? That is useful to know in case there might be a better way
> > to achieve the goal.
> 
> The secondary vm's dirty bitmap.

This is going to be quite large, potentially.  Is assembling it in
memory in one go really the right approach ?

Also, I'm not sure why this information needs to be plumbed through to
libxl ?  Maybe it would be better to offer libxc a backchannel,
directly.

Ian.

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