Commit 2abb65a3 authored Mar 24, 2020 by Roger Pau Monne Committed by Boris Ostrovsky May 21, 2020

xen: enable BALLOON_MEMORY_HOTPLUG by default

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 <ian.jackson@eu.citrix.com>
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Link: https://lore.kernel.org/r/20200324150015.50496-2-roger.pau@citrix.com

Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>

parent 0df683ff

drivers/xen/Kconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -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.