linux-kernel - Re: [PATCH 1/4] xen: mask_rw_pte mark RO all pagetable pages up to pgt_buf

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Date:	Wed, 13 Apr 2011 11:24:47 +0100
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC:	Stefano Stabellini <Stefano.Stabellini@...citrix.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"jeremy@...p.org" <jeremy@...p.org>,
	"yinghai@...nel.org" <yinghai@...nel.org>,
	"hpa@...ux.intel.com" <hpa@...ux.intel.com>,
	"mingo@...e.hu" <mingo@...e.hu>
Subject: Re: [PATCH 1/4] xen: mask_rw_pte mark RO all pagetable pages up to
 pgt_buf_top

On Tue, 12 Apr 2011, Konrad Rzeszutek Wilk wrote:
> On Tue, Apr 12, 2011 at 12:19:49PM +0100, stefano.stabellini@...citrix.com wrote:
> > From: Stefano Stabellini <stefano.stabellini@...citrix.com>
> > 
> > mask_rw_pte is currently checking if a pfn is a pagetable page if it
> > falls in the range pgt_buf_start - pgt_buf_end but that is incorrect
> > because pgt_buf_end is a moving target: pgt_buf_top is the real
> > boundary.
> 
> OK. Stuck it on the queue for rc3.

great, thanks.
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