linux-kernel - Re: [PATCHv2 00/10] mm, xen/balloon: memory hotplug improvements

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Message-ID: <20150727193734.GA3492@olila.local.net-space.pl>
Date:	Mon, 27 Jul 2015 21:37:34 +0200
From:	Daniel Kiper <daniel.kiper@...cle.com>
To:	David Vrabel <david.vrabel@...rix.com>
Cc:	xen-devel@...ts.xenproject.org,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCHv2 00/10] mm, xen/balloon: memory hotplug improvements

On Fri, Jul 24, 2015 at 12:47:38PM +0100, David Vrabel wrote:
> The series improves the use of hotplug memory in the Xen balloon
> driver.
>
> - Reliably find a non-conflicting location for the hotplugged memory
>   (this fixes memory hotplug in a number of cases, particularly in
>   dom0).
>
> - Use hotplugged memory for alloc_xenballooned_pages() (keeping more
>   memory available for the domain and reducing fragmentation of the
>   p2m).
>
> Changes in v2:
> - New BP_WAIT state to signal the balloon process to wait for
>   userspace to online the new memory.
> - Preallocate P2M entries in alloc_xenballooned_pages() so they do not
>   need allocated later (in a context where GFP_KERNEL allocations are
>   not possible).

Thanks! I will take a look at it this week.

Daniel
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