linux-kernel - Re: [PATCH 2/4] Add replace_page(), change the mapping of pte from one page into another

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Message-ID: <Pine.LNX.4.64.0811121428120.31606@quilx.com>
Date:	Wed, 12 Nov 2008 14:31:18 -0600 (CST)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Lee Schermerhorn <Lee.Schermerhorn@...com>
cc:	Andrea Arcangeli <aarcange@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Izik Eidus <ieidus@...hat.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, kvm@...r.kernel.org, chrisw@...hat.com,
	avi@...hat.com, izike@...ranet.com
Subject: Re: [PATCH 2/4] Add replace_page(), change the mapping of pte from
 one page into another

On Wed, 12 Nov 2008, Lee Schermerhorn wrote:

> Might want/need to check for migration entry in do_swap_page() and loop
> back to migration_entry_wait() call when the changed pte is detected
> rather than returning an error to the caller.
>
> Does that sound reasonable?

The reference count freezing and the rechecking of the pte in
do_swap_page() does not work? Nick broke it during lock removal for the
lockless page cache?


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