linux-kernel - Re: [patch] mm, compaction: drain pcps for zone when kcompactd fails

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Message-Id: <20180301152737.62b78dcb129339a3261a9820@linux-foundation.org>
Date:   Thu, 1 Mar 2018 15:27:37 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     David Rientjes <rientjes@...gle.com>
Cc:     Vlastimil Babka <vbabka@...e.cz>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [patch] mm, compaction: drain pcps for zone when kcompactd
 fails

On Thu, 1 Mar 2018 03:42:04 -0800 (PST) David Rientjes <rientjes@...gle.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...