linux-kernel - Re: [Xen-devel] [PATCH 7/7] xen/mmu: Remove from _

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Message-ID: <20120731143732.GI4789@phenom.dumpdata.com>
Date:	Tue, 31 Jul 2012 10:37:33 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Konrad Rzeszutek Wilk <konrad@...nok.org>
Cc:	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [Xen-devel] [PATCH 7/7] xen/mmu: Remove from __ka space PMD
 entries for pagetables.

> > > +	/* This is superflous and shouldn't be neccessary, but you know what
> > > +	 * lets do it. The MODULES_VADDR -> MODULES_END should be clear of
> > > +	 * anything at this stage. */
> > > +	xen_cleanhighmap(MODULES_VADDR, roundup(MODULES_VADDR, PUD_SIZE) - 1);
> > 
> > I would stick an #ifdef CONFIG_DEBUG of some kind around it
> 
> I am not really sure why, but we seem to have PMDs filed after the Xen
> pagetables. I thought it was the bootstack, but it just looked like we
> were filling up to the next PMD (so the 'roundup' right above this code
> should take care of that). But let me double check that - to reproduce
> this module loading problem I hacked the hypervisor to create a huge P2M

I am not seeing this anymore, so #ifdef DEBUG it is!
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