Re: [PATCH RESEND 5/6] Drivers: hv: balloon: Implement hot-addfunctionality

From: Olaf Hering
Date: Wed Mar 13 2013 - 12:50:23 EST


On Tue, Mar 12, K. Y. Srinivasan wrote:

> Implement the memory hot-add functionality. With this, Linux guests can fully
> participate in the Dynamic Memory protocol implemented in the Windows hosts.

> +++ b/drivers/hv/Kconfig
> @@ -15,7 +15,7 @@ config HYPERV_UTILS
>
> config HYPERV_BALLOON
> tristate "Microsoft Hyper-V Balloon driver"
> - depends on HYPERV
> + depends on HYPERV && MEMORY_HOTPLUG
> help
> Select this option to enable Hyper-V Balloon driver.

This driver now depends on CONFIG_MEMORY_HOTPLUG, which is disabled in
openSuSE i386 kernel. As a result, the hv_balloon driver disappears for
32bit kernels.

Any chance that the Kconfig dependency can be moved inside the code so
that a 32bit guest can still do balloon operations?


Olaf
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