linux-kernel - Re: [Patch V2 1/2] xen: prepare p2m list for memory hotplug

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Message-ID: <20150320134208.GI27971@olila.local.net-space.pl>
Date:	Fri, 20 Mar 2015 14:42:08 +0100
From:	Daniel Kiper <daniel.kiper@...cle.com>
To:	Juergen Gross <jgross@...e.com>
Cc:	linux-kernel@...r.kernel.org, xen-devel@...ts.xensource.com,
	konrad.wilk@...cle.com, david.vrabel@...rix.com,
	boris.ostrovsky@...cle.com, pebolle@...cali.nl
Subject: Re: [Patch V2 1/2] xen: prepare p2m list for memory hotplug

On Fri, Mar 20, 2015 at 01:55:38PM +0100, Juergen Gross wrote:
> Commit 054954eb051f35e74b75a566a96fe756015352c8 ("xen: switch to linear
> virtual mapped sparse p2m list") introduced a regression regarding to
> memory hotplug for a pv-domain: as the virtual space for the p2m list
> is allocated for the to be expected memory size of the domain only,
> hotplugged memory above that size will not be usable by the domain.
>
> Correct this by using a configurable size for the p2m list in case of
> memory hotplug enabled (default supported memory size is 512 GB for
> 64 bit domains and 4 GB for 32 bit domains).
>
> Signed-off-by: Juergen Gross <jgross@...e.com>

Reviewed-by: Daniel Kiper <daniel.kiper@...cle.com>

Daniel
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