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Subject: Re: Allow migration of mlocked page?
From: Peter Zijlstra <peterz@infradead.org>
Date: Mon, 14 May 2012 09:45:01 +0200
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To: Minchan Kim <minchan@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>, Mel Gorman <mgorman@suse.de>, Rik van Riel <riel@redhat.com>, Andrew Morton <akpm@linux-foundation.org>, Andrea Arcangeli <aarcange@redhat.com>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>, Christoph Lameter <cl@linux-foundation.org>, "linux-mm@kvack.org" <linux-mm@kvack.org>, tglx@linutronix.de, Ingo Molnar <mingo@redhat.com>, Theodore Ts'o <tytso@mit.edu>

On Mon, 2012-05-14 at 16:37 +0900, Minchan Kim wrote:
> What's the meaning of "locked"? Isn't it pinning?

It doesn't say, the best inference I can make is that locked means the
effect of mlock() which is defined as: 'to be memory-resident', esp. so
since it then states: 'until unlocked' (or exit/exec).

So basically the statement: 'locked and memory-resident' is redundant.


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