linux-kernel - Re: [Xen-devel] [PATCH] xen: limit memory to architectural maximum

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Message-ID: <55E9BC31.6000502@citrix.com>
Date:	Fri, 4 Sep 2015 16:43:45 +0100
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>
Subject: Re: [Xen-devel] [PATCH] xen: limit memory to architectural maximum

On 04/09/15 13:18, Juergen Gross wrote:
> When a pv-domain (including dom0) is started it tries to size it's
> p2m list according to the maximum possible memory amount it ever can
> achieve. Limit the initial maximum memory size to the architectural
> limit of the hardware in order to avoid overflows during remapping
> of memory.
> 
> This problem will occur when dom0 is started with an initial memory
> size being a multiple of 1GB, but without specifying it's maximum
> memory size. The kernel must be configured without
> CONFIG_XEN_BALLOON_MEMORY_HOTPLUG for the problem to happen.

Applied to for-linus-4.3, thanks.

David
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