From: Christoph Lameter <clameter@engr.sgi.com>
To: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>,
Christoph Lameter <clameter@engr.sgi.com>,
Lee Schermerhorn <lee.schermerhorn@hp.com>,
linux-mm <linux-mm@kvack.org>
Subject: Re: [RFC] 0/4 Migration Cache Overview
Date: Tue, 21 Feb 2006 10:04:05 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.4.64.0602211001110.19955@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20060221184016.GA19696@dmt.cnet>
On Tue, 21 Feb 2006, Marcelo Tosatti wrote:
> The idea was to create a "partition" inside the swapcache which allows
> for mapping+offset->pfn translation _without_ actually occupying space
> in the swap map (an idr table is used instead).
>
> But apparently Christoph's mechanism adds the PFN number into
> the page table entry itself, thus fulfilling the requirement for
> "mapping+offset"->pfn indexing required for removal of pages underneath
> a living process. Is that right?
Right. Swap ptes contain the index into swap space which I am using to
preserve the information contained in the pte's of anonymous pages. Thus
the existing swap ptes couild be used. There were just a few minor
modifications to the swap functions required.
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next prev parent reply other threads:[~2006-02-21 18:04 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-17 15:36 Lee Schermerhorn
2006-02-17 16:22 ` Christoph Lameter
2006-02-17 16:59 ` Lee Schermerhorn
2006-02-17 17:12 ` Christoph Lameter
2006-02-21 3:18 ` Nick Piggin
2006-02-21 18:40 ` Marcelo Tosatti
2006-02-21 18:04 ` Christoph Lameter [this message]
2006-02-21 18:49 ` Lee Schermerhorn
2006-02-21 19:19 ` Christoph Lameter
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