On Fri, Oct 21, 2016 at 10:25:21AM -0700, Dave Hansen wrote:

quoted

On 10/20/2016 11:24 PM, Liang Li wrote:

quoted

Dave Hansen suggested a new scheme to encode the data structure,
because of additional complexity, it's not implemented in v3.

So, what do you want done with this patch set?  Do you want it applied
as-is so that we can introduce a new host/guest ABI that we must
support until the end of time?  Then, we go back in a year or two and
add the newer format that addresses the deficiencies that this ABI has
with a third version?

Exactly my questions.

Hi Dave & Michael,

In the V2, both of you thought that the memory I allocated for the bitmap is too large, and gave some
 suggestions about the solution, so I changed the implementation and used  scattered pages for the bitmap
instead of a large physical continued memory. I didn't get the comments about the changes, so I am not 
sure whether that is OK or not, that's the why I resend the V3, I just want your opinions about that part. 

I will implement the new schema as Dave suggested in V4. Before that, could you take a look at this version and
give some comments? 

Thanks!
Liang

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