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    SubjectRe: [PATCH v2 0/4] make balloon pages movable by compaction
    Hi Rafael,

    On 06/29/2012 06:49 AM, Rafael Aquini wrote:

    > This patchset follows the main idea discussed at 2012 LSFMMS section:
    > "Ballooning for transparent huge pages" -- http://lwn.net/Articles/490114/


    Could you summarize the problem, solution instead of link URL in cover-letter?
    IIUC, the problem is that it is hard to get contiguous memory in guest-side
    after ballooning happens because guest-side memory could be very fragmented
    by ballooned page. It makes THP page allocation of guest-side very poor success ratio.

    The solution is that when memory ballooning happens, we allocates ballooned page
    as a movable page in guest-side because they can be migrated easily so compaction of
    guest-side could put together them into either side so that we can get contiguous memory.
    For it, compaction should be aware of ballooned page.

    Right?

    --
    Kind regards,
    Minchan Kim


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