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[XenPPC] Re: PG_arch_1 conflict

from [Hollis Blanchard]

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To:	"Magenheimer, Dan (HP Labs Fort Collins)" <dan.magenheimer@xxxxxx>
Subject:	[XenPPC] Re: PG_arch_1 conflict
From:	Hollis Blanchard <hollisb@xxxxxxxxxx>
Date:	Fri, 10 Mar 2006 14:37:56 -0600
Cc:	Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>, xen-ppc-devel@xxxxxxxxxxxxxxxxxxx, xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
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Magenheimer, Dan (HP Labs Fort Collins) wrote:

We're not quite to the point of bringing up networking
yet but in digging through the mailing list archive,
I was reminded of a problem that we will soon run into:
Xenlinux/x86 utilizes the PG_arch_1 bit to represent
a "foreign" page.  Linux/ia64 (and I think Linux/ppc)
use the PG_arch_1 bit for arch-dep purposes.

It this conflict is not resolved before Xenlinux/ia64
supports networking, there will likely be some very
interesting bugs...


What is the actual issue here? Where is the code dealing with PG_arch_1?

--
Hollis Blanchard
IBM Linux Technology Center

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