From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ingo Molnar <mingo@elte.hu>
Subject: Re: [patch 06/26] Xen-paravirt_ops: paravirt_ops:
	allocate a fixmap slot
Date: Tue, 27 Feb 2007 11:11:43 +0100
Message-ID: <20070227101143.GC10827@elte.hu>
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To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Zachary Amsden <zach@vmware.com>, xen-devel@lists.xensource.com, virtualization@lists.osdl.org, Rusty Russell <rusty@rustcorp.com.au>, linux-kernel@vger.kernel.org, Chris Wright <chrisw@sous-sol.org>, Andi Kleen <ak@muc.de>, Andrew Morton <akpm@linux-foundation.org>
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* Jeremy Fitzhardinge <jeremy@goop.org> wrote:

> Allocate a fixmap slot for use by a paravirt_ops implementation.  Xen 
> uses this to map the hypervisor's shared info page, which doesn't have 
> a pseudo-physical page number, and therefore can't be mapped 
> ordinarily.

why not vmalloc it on the guest side? fixmaps are bad for this purpose 
for a general paravirt implementation, it limits the size of the shared 
info page, etc.

	Ingo