From mboxrd@z Thu Jan  1 00:00:00 1970
From: Hollis Blanchard <hollisb@us.ibm.com>
Subject: Re: Linux PG_arch_1 conflict
Date: Fri, 10 Mar 2006 14:59:10 -0600
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To: "Magenheimer, Dan (HP Labs Fort Collins)" <dan.magenheimer@hp.com>
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Magenheimer, Dan (HP Labs Fort Collins) wrote:
> See previous discussion at:
> 
> http://lists.xensource.com/archives/html/xen-devel/2005-12/msg00238.html
> 
> 
> The issue is that PG_arch_1 is reserved for arch-specific
> usage, the paravirtualization changes for Xenlinux utilize
> it (to mark foreign pages) because it was otherwise unused
> in Linux/x86.  But Xen is no longer an arch.
> 
> Grep'ing for "PageForeign" in -sparse will show most (all?)
> of the actual uses of it.  Nearly all are in x86-specific
> code.  But one is in netback_init().

That thread seems to already have a solution. Has anybody run it past 
Linux MM people? (Adding xen-devel to CC for greater exposure.)

-- 
Hollis Blanchard
IBM Linux Technology Center