linux-kernel - Re: [Xen-devel] Re: [PATCH] XEN_DOMAIN

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20111019140525.GC7313@phenom.dumpdata.com>
Date:	Wed, 19 Oct 2011 10:05:25 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Ian Campbell <ijc@...lion.org.uk>
Cc:	Konrad Rzeszutek Wilk <konrad@...nok.org>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	xen-devel@...ts.xensource.com, linux-kernel@...r.kernel.org,
	Maxim Uvarov <maxim.uvarov@...cle.com>
Subject: Re: [Xen-devel] Re: [PATCH] XEN_DOMAIN_MEMORY options.

On Sat, Oct 15, 2011 at 05:42:48PM +0100, Ian Campbell wrote:
> On Sat, 2011-10-15 at 09:05 -0400, Konrad Rzeszutek Wilk wrote:
> > > On 10/14/2011 04:41 PM, Jeremy Fitzhardinge wrote:
> 
> > > >While it would be very silly to put 128GB of actual RAM on a 32-bit
> > > >machine, systems can have non-contiguous RAM placed at high addresses,
> > > >which would no longer be accessible.
> > 
> > Do you have some ideas of which machines that might be?
> 
> Even if you were on such a machine, the discontiguity
> (discontiguousness?) wouldn't ever be reflected in the pseudo-physical
> memory map, would it? So since this variable controls the maximum size
> of the p2m (rather than the m2p) it doesn't need to be larger than the
> maximum sane 32 bit guest size (<64G).

I think it is the other way around. The M2P would not be affected but
the P2M might? The "discontinuity" is in the E820 right? (so mega big
holes in it).
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/