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From: Andrea Arcangeli <aarcange@redhat.com>
To: "Rafael J. Wysocki" <rjw@suse.com>
Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
        Jiri Slaby <jirislaby@gmail.com>, linux-mm@kvack.org,
        Andrew Morton <akpm@linux-foundation.org>
Subject: Re: khugepaged doesn't want to freeze
Date: Tue,  8 Nov 2011 16:29:10 +0100
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[PATCH] thp: reduce khugepaged freezing latency

Beware patch untested but I suspect the problem was the lack of
wakeup during long schedule_timeout. And a missing try_to_freeze in
case alloc_hugepage repeatedly fails in the CONFIG_NUMA=n case.