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Date: Mon, 4 Mar 2002 21:12:25 -0300 (BRT)
From: Rik van Riel <riel@conectiva.com.br>
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To: Andrea Arcangeli <andrea@suse.de>
Cc: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>,
        Stephan von Krawczynski <skraw@ithnet.com>, <phillips@bonn-fries.net>,
        <davidsen@tmr.com>, <mfedyk@matchmail.com>,
        <linux-kernel@vger.kernel.org>
Subject: Re: 2.4.19pre1aa1
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On Mon, 4 Mar 2002, Andrea Arcangeli wrote:
> On Mon, Mar 04, 2002 at 10:46:54AM -0800, Martin J. Bligh wrote:

> > seems to me to be that the way we do current swap-out scanning is virtual,
> > not physical, and thus cannot be per zone => per node.
>
> actually if you do process bindings the pte should be all allocated
> local to the node if numa is enabled, and if there's no binding, no
> matter if you have rmap or not, the ptes can be spread across the whole
> system (just like the physical pages in the inactive/active lrus,
> because they're not per-node).

Think shared pages.

With -rmap you'll scan all the page table entries mapping
the pages on the current node, regardless of which node
the page tables live.

Without -rmap you'll need to scan all page table entries
in the system, not just the ones mapping pages on the
current node.

regards,

Rik
-- 
"Linux holds advantages over the single-vendor commercial OS"
    -- Microsoft's "Competing with Linux" document

http://www.surriel.com/		http://distro.conectiva.com/

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