From 2abb65a39bcca0629437bb83e583889f9e1ad696 Mon Sep 17 00:00:00 2001 From: Roger Pau Monne Date: Tue, 24 Mar 2020 16:00:15 +0100 Subject: [PATCH] xen: enable BALLOON_MEMORY_HOTPLUG by default MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Without it a PVH dom0 is mostly useless, as it would balloon down huge amounts of RAM in order get physical address space to map foreign memory and grants, ultimately leading to an out of memory situation. Such option is also needed for HVM or PVH driver domains, since they also require mapping grants into physical memory regions. Suggested-by: Ian Jackson Signed-off-by: Roger Pau Monné Link: https://lore.kernel.org/r/20200324150015.50496-2-roger.pau@citrix.com Reviewed-by: Juergen Gross Signed-off-by: Boris Ostrovsky --- drivers/xen/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig index ce024e57274c..727f11eb46b2 100644 --- a/drivers/xen/Kconfig +++ b/drivers/xen/Kconfig @@ -13,6 +13,7 @@ config XEN_BALLOON config XEN_BALLOON_MEMORY_HOTPLUG bool "Memory hotplug support for Xen balloon driver" depends on XEN_BALLOON && MEMORY_HOTPLUG + default y help Memory hotplug support for Xen balloon driver allows expanding memory available for the system above limit declared at system startup.