linux-kernel - Re: [Xen-devel] [PATCH V2 1/5] Xen: Delay remapping memory of pv-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]

Date:	Fri, 7 Nov 2014 14:57:58 +0000
From:	David Vrabel <david.vrabel@...rix.com>
To:	Juergen Gross <jgross@...e.com>, <linux-kernel@...r.kernel.org>,
	<xen-devel@...ts.xensource.com>, <konrad.wilk@...cle.com>,
	<david.vrabel@...rix.com>, <boris.ostrovsky@...cle.com>,
	<x86@...nel.org>, <tglx@...utronix.de>, <mingo@...hat.com>,
	<hpa@...or.com>
Subject: Re: [Xen-devel] [PATCH V2 1/5] Xen: Delay remapping memory of pv-domain

On 06/11/14 05:47, Juergen Gross wrote:
> Early in the boot process the memory layout of a pv-domain is changed
> to match the E820 map (either the host one for Dom0 or the Xen one)
> regarding placement of RAM and PCI holes. This requires removing memory
> pages initially located at positions not suitable for RAM and adding
> them later at higher addresses where no restrictions apply.
> 
> To be able to operate on the hypervisor supported p2m list until a
> virtual mapped linear p2m list can be constructed, remapping must
> be delayed until virtual memory management is initialized, as the
> initial p2m list can't be extended unlimited at physical memory
> initialization time due to it's fixed structure.
> 
> A further advantage is the reduction in complexity and code volume as
> we don't have to be careful regarding memory restrictions during p2m
> updates.

Reviewed-by: David Vrabel <david.vrabel@...rix.com>

But I would like a second reviewed-by.

David
--
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/