On Thu, Jul 30, 2015 at 06:03:10PM +0100, David Vrabel wrote: > alloc_xenballooned_pages() is used to get ballooned pages to back > foreign mappings etc. Instead of having to balloon out real pages, > use (if supported) hotplugged memory. > > This makes more memory available to the guest and reduces > fragmentation in the p2m. > > This is only enabled if the xen.balloon.hotplug_unpopulated sysctl is > set to 1. This sysctl defaults to 0 in case the udev rules to > automatically online hotplugged memory do not exist. > > Signed-off-by: David Vrabel <david.vrabel@xxxxxxxxxx> Reviewed-by: Daniel Kiper <daniel.kiper@xxxxxxxxxx> Daniel -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>