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    SubjectRe: [patch] mm, compaction: drain pcps for zone when kcompactd fails
    On Thu, 1 Mar 2018, Andrew Morton wrote:

    > On Thu, 1 Mar 2018 03:42:04 -0800 (PST) David Rientjes <rientjes@google.com> wrote:
    >
    > > It's possible for buddy pages to become stranded on pcps that, if drained,
    > > could be merged with other buddy pages on the zone's free area to form
    > > large order pages, including up to MAX_ORDER.
    >
    > I grabbed this as-is. Perhaps you could send along a new changelog so
    > that others won't be asking the same questions as Vlastimil?
    >
    > The patch has no reviews or acks at this time...
    >

    Thanks.

    As mentioned in my response to Vlastimil, I think the case could also be
    made that we should do drain_all_pages(zone) in try_to_compact_pages()
    when we defer for direct compactors. It would be great to have feedback
    from those on the cc on that point, the patch in general, and then I can
    send an update.

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