From owner-freebsd-hackers  Fri Jul  5 17:58:59 2002
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Message-ID: <3D2640A7.3EA2236B@pantherdragon.org>
Date: Fri, 05 Jul 2002 17:58:15 -0700
From: Darren Pilgrim <dmp@pantherdragon.org>
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To: freebsd-hackers@FreeBSD.ORG
Subject: How does swap work address spacewise?
References: <20020705113532.GA11273@atrbg11.informatik.tu-muenchen.de> <20020705133515.GA295@HAL9000.wox.org> <20020705133837.GA513@HAL9000.wox.org> <20020705234126.GA12183@atrbg11.informatik.tu-muenchen.de>
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If RAM + swap can be more than 4GB, how does FreeBSD address swap on a
32-bit machine?  Does the kernel internally use a wider address space
with some kind of translation to 32-bit space for programs and hardware
that can't handle 64-bit addresses or does it not map swap into the
address space at all, instead using it as a kind of "offline" storage
for pages not in use?  Does the Alpha port handle swap the same way?

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