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Date: Mon, 19 Jun 2006 08:35:09 -0700 (PDT)
From: Christoph Lameter <clameter@sgi.com>
To: Nick Piggin <npiggin@suse.de>
cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
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       Christoph Lameter <clameter@engr.sgi.com>, Jens Axboe <axboe@suse.de>,
       Linux Memory Management List <linux-mm@kvack.org>
Subject: Re: [patch] rfc: fix splice mapping race?
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On Sun, 18 Jun 2006, Nick Piggin wrote:

> In page migration, detect the missing mapping early and bail out if
> that is the case: the page is not going to get un-truncated, so
> retrying is just a waste of time.

Note that swap_page() has been removed in Andrew's tree.

We already check for the mapping being NULL before we get to 
swap_page by the way. See migrate_pages().