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Date: Wed, 29 Feb 2012 12:38:18 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
        Johannes Weiner <jweiner@redhat.com>,
        KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Subject: Re: [PATCH resend] mm: drain percpu lru add/rotate page-vectors on
 cpu hot-unplug
Message-Id: <20120229123818.61a61e9d.akpm@linux-foundation.org>
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On Tue, 28 Feb 2012 23:40:45 +0400
Konstantin Khlebnikov <khlebnikov@openvz.org> wrote:

> This cpu hotplug hook was accidentally removed in commit v2.6.30-rc4-18-g00a62ce
> ("mm: fix Committed_AS underflow on large NR_CPUS environment")

That was a long time ago - maybe we should leave it removed ;) I mean,
did this bug(?) have any visible effect?  If so, what was that effect?

IOW, the changelog didn't give anyone any reason to apply the patch to
anything!